TY - RPRT TI - Induction of amphibian oocyte maturation by polyvalent cations and alkaline pH in the absence of potassium ions. AU - E C Kofoid AU - D C Knauber AU - J E Allende PY - 1979 DO - 10.1016/0012-1606(79)90126-x UR - https://pubmed.ncbi.nlm.nih.gov/41790/ ID - 41790 ER -