@article{CM_1993__85_3_249_0,
     author = {Roberts, Leslie G. and Singh, Balwant},
     title = {Subintegrality, invertible modules and the {Picard} group},
     journal = {Compositio Mathematica},
     pages = {249--279},
     publisher = {Kluwer Academic Publishers},
     volume = {85},
     number = {3},
     year = {1993},
     mrnumber = {1214447},
     zbl = {0782.13006},
     language = {en},
     url = {http://www.numdam.org/item/CM_1993__85_3_249_0/}
}