TY  - JOUR 
T1  - Use of the EPR technique to determine thermal stability of some humified organic substances found in soil organic-mineral fractions
JO  - Química Nova
A1  - Saab, Sérgio da Costa
A1  - Martin-Neto, Ladislau
SN  - 0100-4042
UL  - 10.1590/S0100-40422003000400010
VL  - 26 
Y1  - 2003
PB  - Brazil 
ER  -