@article{BMMS_2006_29_2_a6,
     author = {Arsham Borumand Saeid},
     title = {FuzzyQS-Algebras with
      {Interval-Valued} {Membership} {Functions}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2006},
     volume = {29},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2006_29_2_a6/}
}