Creation of new forms of immunologically compatible grafts, derived from umbilical cord - A. A. Isaev; A. A. Prikhodko; S. L. Kiselev; M. A. Lagarkova; I. V. Potapov; I. N. Saburina; N. I. Novikova; V. S. Melikhova (Problems of cryobiology and cryomedicine, 2008)