Berry Holaday, M. G., Derry Holaday, M. G. and Mariya, M. A. (2025) “The Hill and The Valley Model for Successful Business Incubators”, RESEARCH REVIEW International Journal of Multidisciplinary, 10(2), pp. 58–73. doi: 10.31305/rrijm.2025.v10.n2.007.