@phdthesis{ Martín-fernández:2021,

title = { Meanings shown by students and teachers in training on the sine and cosine of an angle },

author = { Enrique Martín-fernández },

director = { LUIS RICO ROMERO and JUAN FRANCISCO RUIZ HIDALGO },

school = { Universidad de Granada },

year = { 2021 },

doi = { https://digibug.ugr.es/handle/10481/68166 },

}