Hashem-Nazari, Mohammad, Akbar Esfahanipour, and S.M.T. Fatemi Ghomi. “Non-Equidistant ‘Basic Form’-Focused Grey Verhulst Models (NBFGVMs) for Ill-Structured Socio-Economic Forecasting Problems”. Journal of Business Economics and Management 18, no. 4 (August 27, 2017): 676-694. Accessed November 27, 2024. https://jeelm.vgtu.lt/index.php/JBEM/article/view/1228.