@article{MZ_1991__206_1_174247,
     author = {R. Sridharan and M.-A. Knus and R. Parimala},
     title = {Pfaffians, central simple algebras and similtudes.},
     journal = {Mathematische Zeitschrift},
     pages = {589--604},
     year = {1991},
     volume = {206},
     number = {1},
     zbl = {0707.16006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__206_1_174247/}
}