@inproceedings{ Martín-fernández_RUIZ_Rico-Romero,

author = { Enrique Martín-fernández and JUAN FRANCISCO RUIZ HIDALGO and Luis Rico-Romero } ,

title = { Meanings of Sine and Cosine as expressed by non-compulsory secondary school students },

booktitle = { Psychology of Mathematics Education 38 },

year = { 2014 },

pages = { None - None },

location = { Vancouver, Canadá },

}