@inbook{ MOLINA_AMBROSE_Del:261-280,
author = { MARTA MOLINA and REBECCA AMBROSE and Aurora Inés Del Río-Cabeza } ,
title = { First encounter with variables by first and third grade spanish students },
booktitle = { Teaching and Learning Algebraic Thinking with 5-to 12-Year Olds. The global evolution of an emerging field of research and practice },
isbn = { 978-3-319-68351-5 },
publisher = { SPRINGER INT PUBLISHING AG },
pages = { 261 - 280 },
year = { 2018 },
}