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http://journals.cambridge.org/action/displayAbstract?aid=1951316
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M. Machatkova,
J. Horakova,
P. Hulinska,
Z. Reckova
and K. Hanzalova
(2008).
Early oocyte penetration can predict the efficiency of bovine embryo production in vitro. Zygote, 16
,
pp 203-209
doi:10.1017/S0967199408004784