@Article{ Ayala_MOLINA:359-382,
author = { Cristina Alejandra Ayala Altamirano and MARTA MOLINA } ,
title = { Fourth-graders¿ justifications in early algebra tasks involving a functional relationship },
journal = { Educational Studies in Mathematics },
year = { 2021 },
volume = { 107 },
pages = { 359-382 },
}