1.
, . Irregular singularities in several variables. Providence, R.I.: American Mathematical Society; 1982.
et . Irregular singularities in several variables. Providence, R.I. : American Mathematical Society, 22 mai 1982. ISBN 0-8218-2270-5
Essen Arno van den & Levelt Antonius Henricus Maria. (1982). Irregular singularities in several variables. American Mathematical Society.
Style de citation MLA (8e éd.)Essen Arno van den et Levelt Antonius Henricus Maria. Irregular Singularities in Several Variables. American Mathematical Society, 1982.
Attention : ces citations peuvent ne pas être correctes à 100%.