By Fein B.   Saltman D.J.   Schacher M.   in Journal of Algebra

ISSN:0021-8693|182|2|546-555

Academic Press‎(1996)‎

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By REISSIG W. H.   FEIN B. L.   ROELOFS W. L.   in Environmental Entomology

ISSN:1938-2936|11|6|1294-1298

Entomological Society of America‎(1982)‎

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