Alpatov WW, 1929. Biometrical studies on variation and races of the honey bee (Apis mellifera L.) The Quarterly Review of Biology 4 (1): 1-58.
Dupraw E, 1965. The recognition and handling of honeybee specimens in nonlinnean taxonomy. Journal of Apicultural Research 4 (2): 71-84.
Farshineh adl MB, Gencer HV and beheregni R, 2007. Morphometric characterizatioon of Iranian (Apis melliferameda), central Anatolian (Apismelliferaanatolica) and Caucasian (Apismelliferacaucasica) honey bee population. Journal of apicultural research and bee world 46 (4): 225-231.
Goetz G, 1959. Die bedeitung des flugelgeaders fur die zuchterische bewrteilung der honigbiene. Zeitschrift Fur bienenforschung 4: 141-148.
Jolliffe IT. 2013. Principal component analysis. Springer Science + Business Media, LLC.
Mostajeran M, Idris MA, Ebadi R and Tahmasebi GhH, 2000. Estimation of heritability coefficient of apparent traits and production of honey in Isfahan bee colonies. Science and Technology of Agriculture and Natural Resources, 4 (1): 119-125.
Rinderer Te, Tucker KW and Collins AM, 1982. Nest cavity selection by swarms of European and africanized honey bees. Journal of Apical Research 21(2): 98-103.
Romesburg HC. 2004. Cluster analysis for researchers. Lulu Press. North Carolina.
Ruttner F, 1988. Biogeography and taxonomy of honey bees. Springer-Verlag, Berlin, Germany, 285 pp.
Ruttner F, Mossadegh MS and Kauhausen-Keller D, 1995. Distribution and variation of size (A pis f lorae F.) in Iran. Apidologie 26:477-486.
Tahmasebi GH, Ebadi R, Esmaili M and Kambousia J, 1998. Morphological Study of Honeybee (Apis melliferaL.) in Iran. Journal of Soil and Water Sciences 2 (1):89-101.
)