1. Description of the skull and non-vestigal dentition of a Miocene platypus (Obdurodon dicksoni N.Sp.) from Riversleigh, Australia, and the problem of monotreme origin;Archer,1992
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3. Echidna IgA supports mammalian unity and traditional Therian relationship;Belov;Mamm. Genome,2002
4. The meiotic chain of chromosomes of monotremata;Bick,1992
5. The chromosomes of the platypus (Ornithorhynchus): Monotremata;Bick;Cytobios,1975