Gene flow and hybridisation in a mixed oak forest (Quercus pyrenaica Willd. and Quercus petraea [Matts.] Liebl.) in central Spain. - Valbuena-Carabana,M..; Gonzalez-Martinez,S..C..; Sork,V..L..; Collada,C..; Soto,A..; Goicoechea,P..G..; Gil,L.. (Heredity, 2005)