no. 2
The covariant systems of Todd and Segre
Séminaire Dubreil. Algèbre et théorie des nombres, Tome 22 (1968-1969) no. 2, Exposé no. 15, 10 p. 
@article{SD_1968-1969__22_2_A3_0,
     author = {Scott, David B.},
     title = {The covariant systems of {Todd} and {Segre}},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:15},
     pages = {1--10},
     publisher = {Secr\'etariat math\'ematique},
     volume = {22},
     number = {2},
     year = {1968-1969},
     zbl = {0216.05802},
     language = {en},
     url = {http://www.numdam.org/item/SD_1968-1969__22_2_A3_0/}
}
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Scott, David B. The covariant systems of Todd and Segre. Séminaire Dubreil. Algèbre et théorie des nombres, Tome 22 (1968-1969) no. 2, Exposé no. 15, 10 p. http://www.numdam.org/item/SD_1968-1969__22_2_A3_0/

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