By Rodrigues Helena Sofia   in International Journal of Computer Mathematics

ISSN:0020-7160|86|10-11|1921-1931

Taylor & Francis Ltd‎(2009)‎

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By RODRIGUES HELENA SOFIA   MONTEIRO M. TERESA T.   TORRES DELFIM F. M.   in Mathematical Population Studies

ISSN:0889-8480|20|4|208-223

Routledge Ltd‎(2013)‎

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