@Article{ CASTRO:83-92,

author = { ENRIQUE CASTRO MARTINEZ } ,

title = { Diagrams Produced by Secondary Students in Multiplicative Comparison Word Problems },

journal = { Journal of Mathematics and System Science },

year = { 2014 },

volume = { 4 },

pages = { 83-92 },

doi = { http://www.davidpublishing.com/davidpublishing/Upfile/1/20/2014/2014012065432245.pdf },

}