The paper Necessary and possible hesitant fuzzy sets: a novel model for group decision making, by J. C. R. Alcantud and A. Giarlotta, has been accepted for publication in Information Fusion. The impact factor of this journal is 5.667, its 5-year impact factor is 5.780 (JCR 2016).
The book Fuzzy Techniques for Decision Making has been published by MDPI (Basel, Switzerland). The Editor of the book is José Carlos R. Alcantud. It is a reprint of the Special issue with the same title, published in the journal Symmetry.