Turekulova, D.M.; Muhambetova, L.K.; Chimgentbaeva, G.K.
(Вестник Карагандинского университета, 2017-03-30)
In modern literature, the term "cluster" is understood in different ways, which is the recognition
of research-
ers to give a comprehensive definition is difficult. The term "cluster" is used in a variety of
forms in ...