TY  - JOUR 
T1  - Close relation between the integrating factor and the Green function for first-order differential equations
JO  - Revista Brasileira de Ensino de Física
A1  - de Castro, Antonio S.
SN  - 1806-1117
UL  - 10.1590/1806-9126-RBEF-2023-0052
VL  - 45 
Y1  - 2023
PB  - Brasil 
ER  -