TY  - JOUR 
T1  - Learning mathematical symbolization: conceptual challenges and instructional strategies in secondary schools
JO  - Bolema: Boletim de Educação Matemática
A1  - Mutodi, Paul
A1  - Mosimege, Mogege
SN  - 0103-636X
UL  - 10.1590/1980-4415v35n70a29
VL  - 35 
Y1  - 2021
PB  - Brasil 
ER  -