no. 2
The cokernel of the operator ∂/∂x n acting on a 𝒟 n -module, II
Compositio Mathematica, Tome 56 (1985) no. 2, pp. 259-269. 
@article{CM_1985__56_2_259_0,
     author = {Van den Essen, Arno},
     title = {The cokernel of the operator $\partial / \partial x_n$ acting on a $\mathcal {D}_n$-module, {II}},
     journal = {Compositio Mathematica},
     pages = {259--269},
     publisher = {Martinus Nijhoff Publishers},
     volume = {56},
     number = {2},
     year = {1985},
     zbl = {0579.58040},
     language = {en},
     url = {http://www.numdam.org/item/CM_1985__56_2_259_0/}
}
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Van den Essen, Arno. The cokernel of the operator $\partial / \partial x_n$ acting on a $\mathcal {D}_n$-module, II. Compositio Mathematica, Tome 56 (1985) no. 2, pp. 259-269. http://www.numdam.org/item/CM_1985__56_2_259_0/

[1] J.-E. Björk: Rings of Differential Operators, Mathematical library series. North-Holland (1979). | MR | Zbl

[2] A. Van Den Essen: Fuchsian modules. Thesis, Catholic University Nijmegen, the Netherlands (1979).

[3] A. Van Den Essen: Le Noyau de l'opérateur ∂/∂x n agissant sur un Dn-module. C.R. Acad. Sci. Paris t. 288 (1979) 687-690. | Zbl

[4] A. Van Den Essen: Un D-module holonome tel que le conoyau de l'opérateur ∂/∂xn soit non-holonome. C.R. Acad. Sci. Paris t. 295 (1982) 455-457. | Zbl

[5] A. Van Den Essen: Le conoyau de l'opérateur ∂/∂ n agissant sur un Dn-module holonome. C.R. Acad. Sci., Paris, t. 296 (1983) 903-906. | Zbl

[6] O. Gabber: Am. Journal of Math. 103 (1981) 445-468. | MR | Zbl

[7] M. Kashiwara: On the maximally overdetermined systems of linear differential equations. I. Publ., R.I.M.S., Kyoto University 10, (1975) 563-579. | MR | Zbl

[8] M. Kashiwara: On the holonomic systems of linear differential equations. II. Inventiones Math. 49 (1978) 121-135. | MR | Zbl

[9] H. Matsumura: Commutative Algebra. New York: W.A. Benjamin, Inc. (1970). | MR | Zbl