@article{MZ_1978__163_172737,
     author = {Daniel B. Shapiro and Enzo R. Gentile},
     title = {Conservative {Quadratic} {Forms.}},
     journal = {Mathematische Zeitschrift},
     pages = {15--24},
     publisher = {mathdoc},
     volume = {163},
     year = {1978},
     zbl = {0371.15011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__163_172737/}
}