Poghosyan, Hasmik Dualities and defects : PhD thesis : 01.04.02- Theoritical Physics / Hasmik Poghosyan ; Yerevan Physics Institute - Yerevan : [s.n.], 2017. - 151 p. ; 30 cm. Adviser :Dr. Gor Sarkissian. Subjects--Topical Terms: Physics Index Terms--Genre/Form: Thesis