@article{SIGMA_2019_15_a57,
     author = {Moulay A. Barkatou and Renat R. Gontsov},
     title = {Linear {Differential} {Systems} with {Small} {Coefficients:} {Various} {Types} of {Solvability} and their {Verification}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2019},
     volume = {15},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2019_15_a57/}
}