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References
Edwards, R. G., Bavister, B. D., and Steptoe, P. C., Nature, 221, 632 (1969).
Austin, C. R., The Mammalian Egg (Blackwell, Oxford, 1961).
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ROTHSCHILD Did Fertilization Occur?. Nature 221, 981 (1969). https://doi.org/10.1038/221981b0
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DOI: https://doi.org/10.1038/221981b0