TY  - DATA
AU  - Khovanov, Mikhail.
TI  - Extended graphical calculus for categorified quantum sl(2) 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9780821891100 (online)
PY  - 2011///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/1029
ER  -