@article{RCM_1972__6_181593,
     author = {Carlos E. Vasco Uribe},
     title = {Introducci\'on a los lazos algebraicos},
     journal = {Revista colombiana de matematicas},
     pages = {69--105},
     publisher = {mathdoc},
     volume = {6},
     year = {1972},
     url = {http://geodesic.mathdoc.fr/item/RCM_1972__6_181593/}
}