@article{10_5427_jsing_2020_21g,
     author = {E. M. N. de Guzm\'an and A. Hefez},
     title = {On the {Colength} of {Fractional} {Ideals}},
     journal = {Journal of Singularities},
     pages = {119--131},
     publisher = {mathdoc},
     volume = {21},
     year = {2020},
     doi = {10.5427/jsing.2020.21g},
     url = {http://geodesic.mathdoc.fr/articles/10.5427/jsing.2020.21g/}
}