Chown, B.: Anaemia from bleeding of the foetus into the mother's circulation. Lancet1: 1213, 1954.
2.
Finn, R., and Harper, D.: Transplacental haemorrhage. Transfusion3: 114, 1963.
3.
Fraser, D.I. , Raper, B.A.: Observation of compatible and incompatible foetal red cells in the maternal circulation. Br. Med. J.4: 303, 1962.
4.
Kleihauer, E. , Braun, H., and Betke, K.: Demonstration von fetalen hemoglobin in den erythrocyten eins blutausstrichs. Klin. Wschr.35: 637, 1957.
5.
Zipursky, A. , Neelands, D., Chown, B., and Israels, L.: The distribution of foetal hemoglobin in the blood of normal children and adults. Pediatrics30: 262, 1962.