title: Arkady V. Sokolov – a scholar, senior colleague, friend and unique personality
abstract: The article is a tribute to Arkady Vasilyevich Sokolov, Russian scientist, professor, Doctor of Science in pedagogy, researcher in the field of librarianship, informatics and social communications theory. Beside the professional relations, there was friendship of many years between Sokolov and the author. The author follows the main stages of Sokolov’s biography and his academic career, discusses his professional interests, namely informatics, bibliography, library science, metatheory of social 
journal: Scientific and Technical Libraries