1. Andresen, E. (1957), Investigations on blood groups of the pig. Nord. Vet. Med. 9. 274–284.
2. Andresen, E. (1964), Further studies on the H blood group system in pigs with special reference to a new red cell antigen He. Acta Genet. (Basel) 14. 319–326.
3. Andresen, E. and Wroblewski, A. (1961), The G and H blood group systems of the pig. Acta Vet. Scand. 2. 267–280.
4. Andresen, E. and Baker, L. N. (1964), The C blood group system in pigs and the detection and estimation of linkage between the C and J systems. Genetics 49. 379–386.
5. Brummerstedt-Hansen, E., Hesselholt, M., Larsen, B. Moustgaard, J., Moller, I., Brauner-Nielsen, P. and Palludan, B. (1962), Recent progress in immunogenetic research. Report Viiith Europ. Conf. Anim. Blood Groups (Mimeo) Ljubljana, 1962.