By NIGER ASHRAFI   GUMEL ABBA   in Mathematical Population Studies

ISSN:0889-8480|18|2|55-86

Routledge Ltd‎(2011)‎

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By Safi Mohammad   Melesse Dessalegn   Gumel Abba   in Bulletin of Mathematical Biology

ISSN:0092-8240|75|7|1104-1137

Elsevier‎(2013)‎

Access to resources Favorite 13.971506