1. Kpa (Penney), a new antigen in the Kell blood group system;Allen;Vox Sanguinis,1957
2. Reliability of the exclusion of paternity after MN- and ABO-systems as elucidated by 20,000 mother-child investigations;Andresen;Acta path. microbiol. scand.,1947
3. Über Blutgruppenfragen: Mutter M, Kind N. Dtsch;Crome;Z. ges. gerichtl. Med.,1935
4. A human blood-group gene intermediate between M and N;Dunsford;Nature,1953
5. On a variety of the human type-antigen M and its relation to other M antigens;Friedenreich;Acta path. microbiol. scand.,1938