Petryshyn, R. I., & Петришин, Р. І. (1995). Averaging method in some problems of the theory of nonlinear oscillations. Institute of Mathematics, NAS of Ukraine.
Chicago-Zitierstil (17. Ausg.)Petryshyn, R. I., und Р. І Петришин. Averaging Method in Some Problems of the Theory of Nonlinear Oscillations. Institute of Mathematics, NAS of Ukraine, 1995.
MLA-Zitierstil (8. Ausg.)Petryshyn, R. I., und Р. І Петришин. Averaging Method in Some Problems of the Theory of Nonlinear Oscillations. Institute of Mathematics, NAS of Ukraine, 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.