ARAVANOPOULOS, A. (2005): Phenotypic variation and population relationships of chestnut (Castanea sativa) in Greece, revealed by multivariate analysis of leaf morphometrics. Acta Horticulturae 693: 230-240.10.17660/ActaHortic.2005.693.28
BOAVIDA, L. C., J. P. SILVA and J. A. FEIJÓ (2001): Sexual reproduction in the cork oak (Quercus suber L.). II. Crossing intra- and interspecific barrieres. Sexual Plant Reproduction 14: 143-152.10.1007/s004970100100
DICKINSON, T. A. (1986): Topodeme differentiation in Ontario taxa of Crataegus (Rosaceae: Maloideae): leaf morphometric evidence. Can. J. Bot. 64: 2738-2747.10.1139/b86-363
ISHIDA, T. A., K. HATTORI, H. SATO and M. T. KIMURA (2003): Differentiation and hybridization between Quercus crispula and Q. dentata (Fagaceae): Insights from morphological traits, amplified fragment length polymorphism markers, and leafminer composition. American Journal of Botany 90(5): 769-776.10.3732/ajb.90.5.769
KLEINSCHMIT, J. R. G., R. BACILIERI, A. KREMER and A. ROLOFF (1995): Comparison of morphological and genetic traits of pedunculate oak (Q. robur L.) and sessile oak (Q. petraea (Matt.) Liebl.). Silvae Genetica 44: 256-269.
KREMER, A., J. L. DUPOUEY, J. D. DEANS, J. COTTRELL, U. CSAIKL, R. FINKELDEY, S. ESPINEL, J. JENSEN, J. KLEINSCHMIT, B. VAN DAM, A. DUCOUSSO, I. FORREST, U. L. DE HEREDIA, A. J. LOWE, M. TUTKOVA, R. C. MUNRO, S. STEINHOFF and V. BADEAU (2002): Leaf morphological differentiation between Quercus robur and Quercus petraea is stable across western European mixed oak stands. Ann. For. Sci. 59: 777-787.
KUMAR, A. and S. H. ROGSTAD (1998): A hierarchical analysis of minisatellite DNA diversity in Gambel oak (Quercus gambelii Nutt.; Fagaceae). Molecular Ecology 7: 859-869.10.1046/j.1365-294x.1998.00400.x
LEFORT, F., M. LALLY, D. THOMPSON and G. C. DOUGLAS (1998): Morphological traits, microsatellite fingerprinting and genetic relatedness of a stand of elite oaks (Q. robur L.) at Tullynally, Ireland. Silvae Genetica 47: 257-262.
NATIVIDADE, J. V. (1936): Estudo histológico dos peridermes do hibrido Quercus ilex x Quercus suber. Cont. Pub. Direccão Geral Florestas Aquicolas 3: 343-368.
NIXON, K. C. (1993): Infrageneric classification of Quercus (Fagaceae) and typification of sectional names. Ann. Sci. For. 50. 25s-34s.10.1051/forest:19930701
PANETSOS, K. P., A. B. SKALTSOYIANNES, F. A. ARAVANOPOULOS, K. DOUNAVI and A. DIMITRAKOPOULOS (1997): Identification of Pinus brutia Ten., P. halepensis Mill. and their putative hybrids. Silvae Genetica 46(5): 253-257.
RIESELBERG, L. H. and N. C. ELLSTRAND (1993): What can molecular and morphological markers tell us about plant hybridization. Crit. Rev. Plant Sci. 12, 213-241.
STEBBINS, G. L., E. B. MATZKE and C. EPLING (1947): Hybridization in a population of Quercus marilandica and Q. ilicifolia. Evolution 1: 79-88.10.1111/j.1558-5646.1947.tb02716.x
TOUMI, L. and R. LUMARET (2001): Allozyme characterization of four mediterrranean evergreen oak species. Biochemical Systematics and Ecology 29: 799-817.10.1016/S0305-1978(01)00024-2