"The collection serves a dual purpose: it provides the physicist or mathematician who works in a different field with an overview of the subject; furthermore, it provides those who work in the subject with a compendium of basic references put conveniently together in one volume." Mathematical Reveiws, 1991 "Thus the book gives a good survey of results in one of the hottest points of mathematical physics from the first hands." Mathematics Abstracts, 1992 "The second volume is such an excellent, representative collection of articles on the very rich field centered around the Yang-Baxter equation that is should have its place on the shelves of every good library. It is also warmly recommended for people wishing to join this active research area as well as for those who just want to learn the main developments." Acta Sci. Math. (Szeged), 1993