@article{700306,
title = {System of differential equations with unstable turning point and multiple element of spectrum of degenerate operator},
booktitle = {Proceedings of Equadiff 9},
series = {GDML\_Books},
publisher = {Masaryk University},
address = {Brno},
year = {1998},
pages = {43-52},
url = {http://dml.mathdoc.fr/item/700306}
}
Bobochko, V. N.; Markush, I. I. System of differential equations with unstable turning point and multiple element of spectrum of degenerate operator, dans Proceedings of Equadiff 9, GDML_Books, (1998), pp. 43-52. http://gdmltest.u-ga.fr/item/700306/