@article{IM_1973__20_142213,
     author = {H.F. Trotter},
     title = {On {S-Equivalence} of {Seifert} {Matrices.}},
     journal = {Inventiones mathematicae},
     pages = {173--208},
     publisher = {mathdoc},
     volume = {20},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM_1973__20_142213/}
}