@incollection{MSMF_1979__59__115_0,
     author = {Pfister, Albrecht},
     title = {Systems of quadratic forms},
     booktitle = {Colloque sur les formes quadratiques (Montpellier, 1977)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {115--123},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {59},
     year = {1979},
     doi = {10.24033/msmf.252},
     mrnumber = {80j:10033},
     zbl = {0407.10017},
     url = {http://www.numdam.org/articles/10.24033/msmf.252/}
}