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[1]
Delves LM, 1974, NUMERICAL SOLUTION I
[2]
EICHLER MME, 1949, T AM MATH SOC, V65, P259
[3]
Gilbert RP, 1970, SIAM J MATH ANAL, V1, P96
[7]
Vekua, 1967, NEW METHODS SOLVING
[9]
[No title captured]