1. Ely, T.E.A. and Howell, C.K.: 1996, ‘Long Term Evolution of Artificial Satellite Orbits Due to Resonant Tesseral Harmonics’, The J. Astron. Sci. Vol. 44,2, pp. 167–190.
2. Grosso, P.R. and Sessin, W.: 1993, ‘Resonance Effects on Satellite Orbits’, Advances in Astron. Sci. Vol. 2, pp. 314–326.
3. Lane M.T.: 1988, An Analytical Treatment of Resonance Effects on Satellite Orbits’, Celestial Mechanics Vol. 42, pp. 3–38.
4. Lima Jr. P H.C.L.: 1998, Sisternas Ressonantes a Altas Excentricidades no Movimento de Satélites Artificiais, Doctoral These, ITA, S.J.C., (in Portuguese).
5. Os6rio, J.P.: 1973, Perturbaçôes de Orbitas de Satélites no Estudo do Campo Gravitacional Terrestre. Imprensa Portuguesa, Porto.