Memoirs of the American Mathematical Society, ISSN 0065-9266 ; Volume 212, Number 996
Print version: Positselski, Leonid, 1973- Two kinds of derived categories, Koszul duality, and comodule-contramodule correspondence. Providence, Rhode Island : American Mathematical Society, c2010 v, 133 pages Memoirs of the American Mathematical Society ; Volume 212, Number 996. ISBN 9780821852965