1 “... on contributions to the Workshop "Lie Theory and Its Applications in Physics" held in Sofia, Bulgaria (on-line...”

2 “... in Physics” (LT-XII), held on 19–25 June 2017 in Varna, Bulgaria. The QTS series was founded on the core...”

3

4 “..., Bulgaria, in June 2011. This book is suitable for an extensive audience of mathematicians, mathematical...”