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Folch, J., Cocero, M. J., Chesne, P., Alabart, J. L., Dominguez, V., Cognie, Y., Roche, A., Fernandez-Arias, A., Marti, J. I., Sanchez, P., Echegoyen, E., Beckers, J. F., Bonastre, A. S. & Vignon, X. (2009). "First birth of an animal from an extinct subspecies (Capra pyrenaica pyrenaica) by cloning". Theriogenology71 (6): 1026–1034. doi:10.1016/j.theriogenology.2008.11.005. பப்மெட்:19167744.
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Folch, J., Cocero, M. J., Chesne, P., Alabart, J. L., Dominguez, V., Cognie, Y., Roche, A., Fernandez-Arias, A., Marti, J. I., Sanchez, P., Echegoyen, E., Beckers, J. F., Bonastre, A. S. & Vignon, X. (2009). "First birth of an animal from an extinct subspecies (Capra pyrenaica pyrenaica) by cloning". Theriogenology71 (6): 1026–1034. doi:10.1016/j.theriogenology.2008.11.005. பப்மெட்:19167744.