Ковалев, Валерий Викторович, and Виталий Валерьевич Ковалев. “About Dog Goodwill, Cat Goodwill and Not Only: To a Question of Far-Fetched Terms, Classifi Cations and Algorithms”. St Petersburg University Journal of Economic Studies, no. 4, Dec. 2016, pp. 124-53, doi:10.21638/11701/spbu05.2016.407.