1. Frisch, B., Bartl, R., Burkhardt, R., Jäger, K. and Pappenberger, R. (1984). Bone marrow histology in the chronic myeloproliferative disorders: criteria for recognition, classification and prognostic evaluation. A study of 3500 biopsies. Bibl. Haematol., 50, 57
2. Georgii, A., Vykoupil, K. F. and Thiele, J. (1984). Classification of chronic myeloproliferative diseases by bone marrow biopsies. Bibl. Haematol., 50, 41
3. Frisch, B., Lewis, S. M., Burkhardt, R. and Bartl, R. (1985). Biopsy Pathology of Bone and Bone Marrow. London: Chapman and Hall
4. Gerwtiz, A. M. (1986). Human megakaryocytopoiesis. Sem. Haematol., 23, 27
5. Burkhardt, R., Bartl, R., Jäger, K., Frisch, B., Kettner, G., Mahl, G. and Sund, M. (1986). Working classification of chronic myeloproliferative disorders based on histological, haematological, and clinical findings. J. Clin. Pathol., 39, 237