18390 Janis Abkowitz/Sandra Catlin/Monica McCallie/Peter Guttorp: Evidence that the number of hematopoietic stem cells per animals in conserverd in mammals. Blood 100/7 (2002), 2665-2667. 19605 Christa Müller/.../Hans Sieburg: Deterministic regulation of hematopoietic stem cell self-renewal and differentiation. Blood 100/4 (2002), 1302-1309. 19603 Makio Ogawa: Differentiation and proliferation of hematopoietic stem cells. Blood 81/11 (1993), 2844-2853. 19604 ZZ: Hematopoietic stem cells. Internet ca. 2001, 17p.