3Chrieriansen J C.Latituclinal reproductive Variation with in a single subapelies of pamtcl turtle, Ahrusemus Picta belli Herperoligica, 1973.152
4Gibbond J W,e tal.Repriductive Variation betweem turtile.populatiome in a single grogtapbice erea,Ecologu,1969.340
5Etchberger C R,et al.The reprocludfive viology of the lemale boggerheacl musk turtle Stermotherus minor mimer from the southera part of its ronge in central , Glorida Herpetologica, 1987.43-46