@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 },

}