@article{PORMA_2004__61_3_51458,
     author = {De Poi, Pietro},
     title = {Congruences of lines with one-dimensional focal locus.},
     journal = {Portugaliae mathematica},
     pages = {329--338},
     publisher = {mathdoc},
     volume = {61},
     number = {3},
     year = {2004},
     zbl = {1067.14049},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_2004__61_3_51458/}
}