Popov, Evgenij, 		Simonova, Viktoriya, AND 		Tikhonova, Anna.
" Improved methodological tools for evaluation of interfirm interaction efficiency in the context of digitalization" <em>Vestnik Permskogo universiteta. Seria Ekonomika = Perm University Herald. Economy</em> [Online], Volume 16 Number 3 (29 October 2021)