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The X bivalent in fetal bovine oocytes.
Koykul W, Switonski M, Basrur PK. Koykul W, et al. Hereditas. 1997;126(1):59-65. doi: 10.1111/j.1601-5223.1997.00059.x. Hereditas. 1997. PMID: 9175494 Free article.