Optimal allocation centers in second kind fuzzy graphs with the greatest base degree

Advances in Intelligent Systems and Computing. 2018. Т. 679. С. 312-321.
https://www.elibrary.ru/item.asp?id=31066925
Bozhenyuk A., Belyakov S., Knyazeva M., Rozenberg I.
Optimal allocation centers in second kind fuzzy graphs with the greatest base degree