@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 },

}