By Shipman Barbara A.   Shipman Patrick D.   in PRIMUS

ISSN:1051-1970|23|2|111-120

Taylor & Francis Ltd‎(2013)‎

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By Motta Francis C.   Shipman Patrick D.   Springer Bethany   in American Mathematical Monthly

ISSN:1930-0972|122|1|52-55

Mathematical Association of America‎(2015)‎

Access to resources Favorite 10.679478