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[14]
Motzkin T., 1935, ATTI ACCAD NAZ LINCE, V21, P562
[15]
PAZY A, 1971, PROBLEMS NONLINEAR A, P345
[16]
Steckin S. B., 1963, REV MATH PURE APPL, V8, P5
[17]
VLASOV LP, 1967, DOKL AKAD NAUK SSSR+, V173, P491
[18]
[No title captured]