M. Georgieva Encheva, ?Phylogenetic development of the family Posidoniidae and the genera Daonella and Halobia (Bivalvia; Triassic)?, Geologica Balcanica, vol. 8, pp. 55-67, 1978.

M. Georgieva Encheva, ?Phylogenetic development of the family Posidoniidae and the genera Daonella and Halobia (Bivalvia; Triassic)?, Geologica Balcanica, vol. 8, pp. 55-67, 1978.