TY  - JOUR 
T1  - Comparison of 6th-8th graders' efficiencies, strategies and representations regarding generalization patterns
JO  - Bolema: Boletim de Educação Matemática
A1  - Akkan, Yasar
SN  - 0103-636X
UL  - 10.1590/S0103-636X2013000400002
VL  - 27 
Y1  - 2013
PB  - Brasil 
ER  -