TY  - DATA
AU  - Positselski, Leonid
TI  - Two kinds of derived categories, Koszul duality, and comodule-contramodule correspondence 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470406134 (online)
PY  - 2011///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0996
ER  -