Caudullo, G., Welk, E., San-Miguel-Ayanz, J., 2017. Chorological maps for the main European woody species. Data in Brief 12, 662-666. DOI: 10.1016/j.dib.2017.05.007
Data: https://doi.org/10.6084/m9.figshare.11891514
References:

• Aradhya, M., Velasco, D., Ibrahimov, Z., Toktoraliev, B., Maghradze, D., Musayev, M., Bobokashvili, Z., Preece, J. E., 2017. Genetic and ecological insights into glacial refugia of walnut (Juglans regia L.). PloS one, 12(10), e0185974. DOI: 10.1371/journal.pone.0185974
• Beer, R., Kaiser, F., Schmidt, K., Ammann, B., Carraro, G., Grisa, E., Tinner, W., 2008. Vegetation history of the walnut forests in Kyrgyzstan (Central Asia): natural or anthropogenic origin?. Quaternary Science Reviews, 27(5-6): 621-632. DOI: 10.1016/j.quascirev.2007.11.012
• Botanical Society of Britain & Ireland. BSBI big database. Accessed in January 2020
• Browicz, K., 1996. Chorology of trees and shrubs in south-west Asia and adjacent regions. Supplement. Poznań: Bogucki Wydawnictwo Naukowe. 48 p. ISBN 9788386001194
• Fang, J., Wang, Z., Tang, Z. (Eds.), 2011. Atlas of Woody Plants in China. Springer Berlin Heidelberg, Berlin, Heidelberg. ISBN 9783642150173
• Gabrielian, E., Zohary, D., 2004. Wild relatives of food crops native to Armenia and Nakhichevan. Flora Mediterranea 14: 5-80.
• Gaisberger, H., Loo, A. J., Thomas, E., van Zonneveld, M, Vinceti, B., Boshier, D., 2014. Threat mapping approach to wild walnut populations in Central Asia. Conference: CGIAR Consortium for Spatial Information (CGIAR-CSI) 2014 Annual Meeting. DOI: 10.13140/2.1.4479.1048
• García del Barrio, J. M., Auñón F. J., Sanchez de Ron, D. SIG-FOREST, Sistema de Información de Especies Forestales. Accessed in January 2020.
• Gaston, A. J., Garson, P. J., Hunter Jr, M. L., 1983. The status and conservation of forest wildlife in Himachal Pradesh, Western Himalayas. Biological conservation, 27(4), 291-314. DOI: 10.1016/0006-3207(83)90088-5
• Ghazanfar, S. A., McDaniel, T., 2016. Floras of the middle east: a quantitative analysis and biogeography of the flora of Iraq. Edinburgh Journal of Botany, 73(1): 1-24 DOI: 10.1017/S0960428615000244
• Ghimire, S. K., Sapkota, I., Oli, B., Rai-Parajuli, R., 2008. Non-Timber Forest Products of Nepal Himalaya: Database of Some Important Species Found in the Mountain Protected Areas and Surrounding Regions. WWF Nepal. Kathmandu, Nepal. ISBN 9789994683796
• Info Flora. The National Data and Information Center on the Swiss Flora. Accessed in January 2020.
• Israel Nature and Parks Authority. Israel Nature and Parks Authority. Accessed via GBIF.org in January 2020.
• Jafari Sayadi, M. H., Vahdati, K., Leslie, C. A., 2011. Comparison of four geographically diverse natural populations of Persian walnut (Juglans regia L.) in north of Iran. In: M.K. Aradhya, M. K., Kluepfel, D. A. (Eds). Proc. 1st International Symposium on Wild Relatives of Subtropical and Temperate Fruit and Nut Crops. ISHS Acta Horticulturae 948: 91-96. ISBN 9789066052567
• Jalas, J., Suominen, J., 1976. Atlas Florae Europaeae: distribution of vascular plants in Europe vol. 3 Salicaceae to Balanophoraceae. Committee for Mapping the Flora of Europe and Societas Biologica Fennica Vanario, Helsinki. ISBN 9519108025
• Juhásová, G., Ivanová, H., Spišák, J., 2005. Occurrence and spread of the parasitic microscopic fungi on walnut (Juglans regia L.) on various localities of Slovakia. Trakya University Journal of Natural Sciences 6(1): 19-27.
• Karimi, R., Ershadi, A., Vahdati, K., Woeste, K., 2010. Molecular characterization of Persian walnut populations in Iran with microsatellite markers. American Society for Horticultural Science, 45(9), 1403-1406. DOI: 10.21273/HORTSCI.45.9.1403
• Lenda, M., Skórka, P., 2009. Orzech włoski Juglans regia–nowy, potencjalnie inwazyjny gatunek w rodzimej florze. Chrońmy Przyrodę Ojczystą, 65(4), 261-270.
• Mauri, A., Strona, G., San-Miguel-Ayanz, J., 2017. EU-Forest, a high-resolution tree occurrence dataset for Europe. Scientific data, 4(1), 1-8. DOI: 10.1038/sdata.2016.123
• NetPhyD: Deutschlandflora WebGIS. Floristische Verbreitungskarten in Deutschland. Accessed in January 2020.
• Norwegian Biodiversity Information Centre. Artsdatabanken. Accessed in January 2020.
• Paudel, P. K., Bhattarai, B. P., Kindlmann, P., 2012. An overview of the biodiversity in Nepal. In: Kindlmann P. (eds). Himalayan biodiversity in the changing world. Springer, Dordrecht: 1-40. DOI: 10.1007/978-94-007-1802-9_1
• Plant Diversity Analysis and Synthesis Centre PLADIAS. Database of the Czech Flora and Vegetation. Accessed in January 2020.
• Pollegioni, P., Woeste, K., Chiocchini, F., Del Lungo, S., Ciolfi, M., Olimpieri, I., Tortolano, V., Clark, J., Hemery, G. E., Mapelli, S., Malvolti, M. E., 2017. Rethinking the history of common walnut (Juglans regia L.) in Europe: Its origins and human interactions. PloS one, 12(3), e0172541. DOI: 10.1371/journal.pone.0172541
• Safarov, N., 2003. First National Report on Biodiversity Conservation of the Republic of Tajikistan. National Biodiversity and Biosafety Center (NBBC). Dushanbe.
• Sociedade Portuguesa de Botânica. Flora-On: Flora de Portugal interactiva. Accessed in January 2020.
• Strid, A., Tan, K. (eds.), 1997. Flora Hellenica, vol I. Koeltz Scientific Books, Königstein. ISBN 9783874293914
• Swedish Species Information Centre ArtDatabanken. Artfakta. Accessed in January 2020.
• Wang, H., Pan, G., Ma, Q., Zhang, J., Pei, D., 2015. The genetic diversity and introgression of Juglans regia and Juglans sigillata in Tibet as revealed by SSR markers. Tree genetics & genomes, 11(1): 1. DOI: 10.1007/s11295-014-0804-3
• Welk, E., Seidler, G., Bruelheide, H., 2019. Chorological Database Halle (unpublished).
• Xu, X., Zhang, H., Yue, J., Xie, T., Xu, Y., Tian, Y., 2018. Predicting shifts in the suitable climatic distribution of walnut (Juglans regia L.) in China: maximum entropy model paves the way to forest management. Forests, 9(3), 103. DOI: 10.3390/f9030103