@inproceedings{ Castro-Martinez_CASTRO,

author = { Encarnacion Castro-Martinez and ENRIQUE CASTRO MARTINEZ } ,

title = { Graphical representation and generalization in sequences problems },

booktitle = { 7th Conference of the European Society for Research in Mathematics Education },

year = { 2011 },

pages = { None - None },

location = { RZESZOW,POLONIA },

}