Castelnuovo's Regularity and Multiplicity.
Complete local factorial rings which are not Cohen-Macaulay in characteristic
Complexes and ideals' resolutions
Conservation des propriétés des fibres formelles d'un anneau semi-local noethérien par complétion adique
Correction and Complements to "On the Symmetric and Rees Algebras of an Ideal"
Correction to "On a functional equation arising from hyperbolic geometry", Volume 21 (1980), 113-116.