1. Agatsuma, T. & Habe, S., 1985. Electrophoretic studies on enzymes of diploid and triploid Paragonimus westermani. Parasitology 91: 489?497.
2. Atkinson, K. H., 1980. Chromosome analysis of Schistosoma rodhaini (Trematoda: Schistosomatidae). Can. J. Genet. Cytol. 22: 143?147.
3. Belopolskaya, M. M., 1949. Developmental cycle of the trematode Spelotrema pygmaeum, a parasite of birds. Dokl. Akad. Nauk SSSR 66: 133?135 (In Russian).
4. Benazzi, M. & Benazzi-Lentati, G., 1976. Animal Cytogenetics. Vol. I. Platyhelminthes. Borntraeger, Berlin-Stuttgart. 182 pp.
5. Birstein, V. J., 1987. Cytogenetical and molecular aspects of vertebrate evolution. Moscow, Nauka Publ. House. 284 p. (In Russian).