1. Nouvelles méthodes pour la détermination des orbites des cométes;Legendre,1806
2. Theoria motus corporum coelestium in sectionibus conicis solem ambientium;Gauss,1809
3. On ill-posed problems of linear algebra and stable methods for solving them;T1khonov;Dokl. Akad. Nauk SSSR,1965
4. On the stability of algorithms for solving degenereate systems of linear algebraic equations;Tikhonov;Zh. vȳchisl. Mat. mat. Fiz.,1965
5. Methods for solving ill-posed problems;Tikhonov,1979