@incollection{AST_1988__168__141_0,
     author = {Howlett, R. B. and Lehrer, G. I.},
     title = {On the integral group algebra of a finite algebraic group},
     booktitle = {Orbites unipotentes et repr\'esentations - I. Groupes finis et Alg\`ebres de Hecke},
     series = {Ast\'erisque},
     pages = {141--155},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {168},
     year = {1988},
     zbl = {0820.20050},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1988__168__141_0/}
}