1. Adamu IM, Tella Y, Alkali AJ (2017) On normal and soft normal groups under multisets and soft multisets context. Mayfeb J Math 2:34–47
2. Adamu IM, Tella Y, Alkali AJ (2019) On normal sub-intuitionistic fuzzy multigroups. Ann Pure Appl Math 19(2):127–139
3. Arabpur F, Jafarpour M, Aminizadeh M, Hoskova-Mayerova S (2020) On geometric polygroups. An. St. Univ. Ovidius Constanta 28(1):17–33
4. Atanassov K (1986) Intuitionistic fuzzy sets. Fuzzy Sets Syst 20:87–96
5. Baby A, Shinoj TK, Sunil JJ (2015) On Abelian fuzzy multi groups and orders of fuzzy multi groups. J New Theory 2:80–93