R. J.  Petit, ?Gene diversity in natural populations of oak species?, Annals of Forest Science, vol. 50, p. 186s-202s, 1993.

F.  Lefort and Douglas, G. C., ?An efficient micro-method of DNA isolation from mature leaves of four hardwood tree species Acer, Fraxinus, Prunus and Quercus?, Annals of Forest Science, vol. 56, pp. 259-263, 1999.

A.  Kremer, Dupouey, J., Deans, J., Cottrell, J., Csaikl, U., Finkeldey, R., Espinel, S., Jensen, J., Kleinschmit, J., Van Dam, B., Ducousso, A., Forrest, I., U. de Heredia, L., Lowe, A., Tutkova, M., Munro, R., Steinhoff, S., and Badeau, V., ?Leaf morphological differentiation between Quercus robur and Quercus petraea is stable across western European mixed oak stands?, Annals of Forest Science, vol. 59, pp. 777-787, 2002.