https://www.youtube.com/watch?v=UiKoV-wb900; Лекция 3 https://www.youtube.com/watch?v=15pKAwIsJJc; Лекция 4 https://www.youtube.com/watch?v=StXENdnDGiw; Лекция 6 https://www.youtube.com/watch?v=7r2280EmZ5c; Лекция 10 https://www.youtube.com/watch?v=OKIWFfC89_0; Лекция 11 https://www.youtube.com/watch?v=dc7DtIfWEU4; Лекция 12