TY  - JOUR 
T1  - On the mean value of the force operator for 1D particles in the step potential
JO  - Revista Brasileira de Ensino de Física
A1  - De Vincenzo, Salvatore
SN  - 1806-1117
UL  - 10.1590/1806-9126-RBEF-2020-0422
VL  - 43 
Y1  - 2021
PB  - Brazil 
ER  -