Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) S. Kobayashi and M. Tomita and J.W. Pollard and S.P. Leibo,Survival of cryopreserved porcine embryos vitrified in ethylene glycol plus polyvinylpyrrolidone,Theriogenology,0093-691X,Elsevier BV,1994-01,41,1,228,https://cir.nii.ac.jp/crid/1360581248266921856,https://doi.org/10.1016/s0093-691x(05)80138-4