Дубовой, В.М. and Сольський, О.С. 2013. Use of fuzzy knowledge base of mamdanizadeh for spatial interpolation of population density. Eastern-European Journal of Enterprise Technologies. 6, 3(66) (Dec. 2013), 26–29. DOI:https://doi.org/10.15587/1729-4061.2013.19175.