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- [4] OSCILLATION OF 1ST-ORDER NONLINEAR DIFFERENTIAL-EQUATIONS WITH DEVIATING ARGUMENTS KEXUE TONGBAO, 1987, 32 (06): : 361 - 365
- [6] OSCILLATIONS FOR 1ST-ORDER NEUTRAL DIFFERENTIAL-EQUATIONS ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 1993, 73 (7-8): : T813 - T815