@article{PM_1992_1992_1_a9,
     author = {Bovdi, Adalbert A. and Sehgal, Sudarshan K.},
     title = {Subgrupo unitario de anillos de grupos enteros.},
     journal = {Publicacions matem\`atiques},
     pages = {197-204},
     year = {1992},
     volume = {36},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1992_1992_1_a9/}
}