Srirungruang, C. ., U. . Pongchairerk, K. . Sirinarumitr, and . S. . Chantakru. “Effect of Solid Surface Vitrifi Cation on Viability and Morphology of Canine Cumulus-Oocyte Complex”. Agriculture and Natural Resources, vol. 46, no. 4, Aug. 2012, pp. 554-6, https://li01.tci-thaijo.org/index.php/anres/article/view/242909.