(NpRAKTIKUM PO RE[ENI@ MATEMATI^ESKIH ZADA^s - (NgUSEW w(B.(Na(B., (NlITWINENKO w(B.(Nn(B., (NmORDKOWI^ a(B.(Ng(B.s ((NmOSKWAs (NpROSWE]ENIEs, 1985)