@article{JEDP_1992____A5_0,
     author = {Kozlov, Vladimir and Maz'ya, Vladimir},
     title = {Solvability and asymptotic behavior of solutions of ordinary differential equations with variable operator coefficients},
     journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {5},
     pages = {1--12},
     publisher = {Ecole polytechnique},
     year = {1992},
     zbl = {0772.34046},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1992____A5_0/}
}