@Article{ Bolaños_LUPIÁÑEZ:1-18,

author = { Hellen Bolaños and JOSÉ LUIS LUPIÁÑEZ GÓMEZ } ,

title = { Errors in understanding the meaning of letters in algebraic assignments by university students },

journal = { Uniciencia },

year = { 2021 },

volume = { 35 },

pages = { 1-18 },

}