TY  - JOUR 
T1  - Proving Abstract Algebra Skills with Problem-Based Learning Integrated with Videos and Worksheets
JO  - Bolema: Boletim de Educação Matemática
A1  - Mairing, Jackson Pasini
SN  - 0103-636X
UL  - 10.1590/1980-4415v35n70a20
VL  - 35 
Y1  - 2021
PB  - Brasil 
ER  -