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[1]
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[2]
KIGURADZE IT, 1962, DOKL AKAD NAUK SSSR+, V144, P33
[3]
KIGURADZE IT, 1967, J DIFFERENTIAL EQUAT, V3, P733
[4]
Kneser A., 1893, MATH ANN, V42, P409
[6]
[No title captured]
[7]
[No title captured]