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2. Fundamental aspects of the freezing of cells with emphasis on mammalian ova and embryos;Mazur,1980
3. Methods for the preservation of mammalian embryos by freezing;Leibo,1978
4. Bovine egg transplantation: Preservation of embryos;Lehn-Jensen;Nord. Vet. Med.,1980
5. Bovine embryo quality and survival rates after fast freezing and thawing;Niemann;Berl. Münch. Tierärztl. Wschr.,1982