@article{paperid:1088371,
author = {M. Ranjbar and S. M. Miri and Effati, Sohrab},
title = {Arithmetic operations and ranking of hesitant fuzzy numbers by extension principle},
journal = {Iranian Journal of Fuzzy Systems},
year = {2021},
volume = {19},
number = {1},
month = {December},
issn = {1735-0654},
pages = {97--114},
			numpages = {17},
keywords = {Hesitant fuzzy number; extension principle on hesitant fuzzy sets; arithmetic operations on hesitant fuzzy
number; ordering of hesitant fuzzy numbers},
}