@article{RM_2009_64_3_a7,
     author = {A. V. Purgin},
     title = {Distributive and geometric lattices of right divisors of linear ordinary differential operators},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {575--576},
     publisher = {mathdoc},
     volume = {64},
     number = {3},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2009_64_3_a7/}
}