Mohammed, Sulma I.; Alfarouk, Khalid O.; Elhassan, Ahmed M.; Hamad, Kamal; Ibrahim, Muntaser E.. «Sociobiological Transition and Cancer». A: The Genetics of African Populations in Health and Disease (en anglès), 2019, p. 217–232. DOI10.1017/9781139680295.010. ISBN 9781139680295.
«Rethinking The Theoretical Foundation of Sociobiology». The Quarterly Review of Biology, 82, 4, 2007, pàg. 327–348. DOI: 10.1086/522809. PMID: 18217526.
«Rethinking The Theoretical Foundation of Sociobiology». The Quarterly Review of Biology, 82, 4, 2007, pàg. 327–348. DOI: 10.1086/522809. PMID: 18217526.