Petkov, V., & Stoyanov, L. N. (2017). Geometry of the generalized geodesic flow and inverse spectral problems (Second edition.). Wiley.
Cita Chicago (17th ed.)Petkov, Vesselin, i Luchezar N. Stoyanov. Geometry of the Generalized Geodesic Flow and Inverse Spectral Problems. Second edition. Chichester, West Sussex: Wiley, 2017.
Cita MLA (9th ed.)Petkov, Vesselin, i Luchezar N. Stoyanov. Geometry of the Generalized Geodesic Flow and Inverse Spectral Problems. Second edition. Wiley, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.