TY  - JOUR 
T1  - Allelopathic effect of black mustard tissues and root exudates on some crops and weeds
JO  - Planta Daninha
A1  - Al-Sherif, E
A1  - Hegazy, A.K.
A1  - Gomaa, N.H.
A1  - Hassan, M.O.
SN  - 0100-8358
UL  - 10.1590/S0100-83582013000100002
VL  - 31 
Y1  - 2013
PB  - Brasil 
ER  -