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2. Studien über die roten Blutkörperchen mit den Methoden der Färbung in frischem Zustand;Cesaris-Demel;Folia Haematol. (Leipz),1907
3. Studies of the ripening of surviving reticulocytes in vitro and their significance in the evaluation of daily haemoglobin production in vivo;Heilmeyer;Z. Klin. Med,1932
4. Purified Azure B as a reticulocyte stain;Marshall;J. clin. Path,1976