no. 2
Singular residue classes which are ordinary for F(a,b,c,λ)
Groupe de travail d'analyse ultramétrique, Tome 10 (1982-1983) no. 2, Exposé no. 23, 11 p. 
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     author = {Dwork, Bernard},
     title = {Singular residue classes which are ordinary for $F(a,\,b,\,c,\,\lambda )$},
     journal = {Groupe de travail d'analyse ultram\'etrique},
     note = {talk:23},
     pages = {1--11},
     publisher = {Secr\'etariat math\'ematique},
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     number = {2},
     year = {1982-1983},
     language = {en},
     url = {http://archive.numdam.org/item/GAU_1982-1983__10_2_A6_0/}
}
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Dwork, Bernard. Singular residue classes which are ordinary for $F(a,\,b,\,c,\,\lambda )$. Groupe de travail d'analyse ultramétrique, Tome 10 (1982-1983) no. 2, Exposé no. 23, 11 p. http://archive.numdam.org/item/GAU_1982-1983__10_2_A6_0/

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