The text of this thesis published in English is identical to the text of the thesis published on the website of the KhNUE in Ukrainian.

Writing this book required an effort not only on the part of the author, but also of the professional scientists who were supervising this work.Writing this book required an effort not only on the part of the author, but also of the professional scientists who were supervising this work.I want to express my deep gratitude to my teachers, persons who have brought to me the light of science, Prof. Dr. Jan-Urban Sandal and Prof. Dr. Tetyana Ivanivna Lepeyko. Without their precise attention and valuable advices this book could not be made. Finally, I want to thank my fa mily for their patience, especially to my father, Dr. Shahin Anver ogli Omarov who is being my first teacher in my life since the moment I have opened my eyes.