@article{MO_2006_1_a0,
     author = {V. V. Ivlev and E. Grjibovskaya},
     title = {Systems of {Linear} {Differential} {Equations.} {Integrable} {Combinations.} {Part} {I}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {2--9},
     year = {2006},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2006_1_a0/}
}