1. The Classification Within the Juglandaceae
2. The fossil history of the Juglandaceae;Manchester,1987
3. The Evolution of Plants;Willis,2002
4. Walnuts (Juglans);McGranahan,1991
5. The wild relatives of fruit trees of the Asian part of the USSR and Caucasus and problems of origin of fruit trees;Vavilov;Tr. Po Prikl. Bot. Genet. Sel.,1931