1. Isolation and physico-chemical characterization of the “IgM-like” immunoglobulin from the stingray Dasyatis americana;Johnston;J. Immunol.,1971
2. Physical properties of immunoglobulins of lower species: A comparison with immunoglobulins of mammals;Litman,1976
3. Emergence of IgM immunoglobulins;Marchalonis,1977
4. Tetrameric immune macroglobulins in three orders of bony fishes;Acton,1971
5. The evolution of the immune response;Frommel;J. Immunol,1971