NÁPRSTEK, J. Non-linear self-excited random vibrations and stability of an SDOF system with parametric noises. In: SOLARI, G., ed. Proceedings of the 2nd European & African Conference on Wind Engineering. Volume 2.. Padova: Servizi Grafici Editoriali, 1997, s. 1975-1982. ISBN 88-86281-19-6.