Borisov, Alexey V.; Mamaev, Ivan S. Generalized problem of two and four Newtonian centers. (English) Zbl 1129.70010 Celest. Mech. Dyn. Astron. 92, No. 4, 371-380 (2005). MSC: 70F10 70F15 PDFBibTeX XMLCite \textit{A. V. Borisov} and \textit{I. S. Mamaev}, Celest. Mech. Dyn. Astron. 92, No. 4, 371--380 (2005; Zbl 1129.70010) Full Text: DOI arXiv
Howard, James E. Stability of relative equilibria in arbitrary axisymmetric gravitational and magnetic fields. (English) Zbl 0952.70016 Celest. Mech. Dyn. Astron. 74, No. 1, 19-57 (1999). Reviewer: Václav Burjan (Praha) MSC: 70H14 70F15 78A35 PDFBibTeX XMLCite \textit{J. E. Howard}, Celest. Mech. Dyn. Astron. 74, No. 1, 19--57 (1999; Zbl 0952.70016) Full Text: DOI
Veres, F. A special case of the problem of two fixed centers. (English) Zbl 0684.70012 Celest. Mech. Dyn. Astron. 46, No. 2, 105-112 (1989). MSC: 70H20 70F07 PDFBibTeX XMLCite \textit{F. Veres}, Celest. Mech. Dyn. Astron. 46, No. 2, 105--112 (1989; Zbl 0684.70012) Full Text: DOI