no. 3
Subintegrality, invertible modules and the Picard group
Compositio Mathematica, Tome 85 (1993) no. 3, pp. 249-279 
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     author = {Roberts, Leslie G. and Singh, Balwant},
     title = {Subintegrality, invertible modules and the {Picard} group},
     journal = {Compositio Mathematica},
     pages = {249--279},
     year = {1993},
     publisher = {Kluwer Academic Publishers},
     volume = {85},
     number = {3},
     mrnumber = {1214447},
     zbl = {0782.13006},
     language = {en},
     url = {https://www.numdam.org/item/CM_1993__85_3_249_0/}
}
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Roberts, Leslie G.; Singh, Balwant. Subintegrality, invertible modules and the Picard group. Compositio Mathematica, Tome 85 (1993) no. 3, pp. 249-279. https://www.numdam.org/item/CM_1993__85_3_249_0/

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