@article{MM2_1998__95_3_156385,
     author = {D. M\"uller and P. Br\"uckmann},
     title = {Birational invariants in the case of prime characteristic.},
     journal = {Manuscripta mathematica},
     pages = {413--430},
     year = {1998},
     volume = {95},
     number = {3},
     zbl = {0922.14010},
     url = {http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156385/}
}