@book { PDF, title = "В защиту Льва Троцкого (PDF)", subtitle = "(Verteidigung Leo Trotzkis)", author = "Дэвид {Норт (David North)}", year = "2018", publisher = "MEHRING Verlag", address = "Essen, Deutschland", url = "https://mehring.openpublishing.com/document/425635" }