@article{CM_1995__95_3_309_0,
     author = {Singh, Balwant},
     title = {The {Picard} group and subintegrality in positive characteristic},
     journal = {Compositio Mathematica},
     pages = {309--321},
     publisher = {Kluwer Academic Publishers},
     volume = {95},
     number = {3},
     year = {1995},
     mrnumber = {1318090},
     zbl = {0858.13001},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1995__95_3_309_0/}
}