1. Albertin U. , Sava P. , Etgen J. and Maharramov M. 2006. Adjoint wave equation velocity analysis. 76th SEG meeting, New Orleans, Louisiana, USA, Expanded Abstracts, TOM2.1.
2. The resolving power of gross earth data;Backus;Geophysical Journal of the Royal Astronomical Society,1968
3. Uniqueness in the inversion of inaccurate gross earth data;Backus;Philosophical Transactions of the Royal Society of London, Series A,1970
4. Bamberger A. , Chavent G. and Lailly P. 1977. Etude mathématique et numérique d'un problem inverse pour l'Équation des ondes a une dimension. Rapport Interne 14, Centre de Mathématiques Appliqués, École Polytechnique, Paris.
5. About the stability of the inverse problem in 1-D wave equation - application to the interpretation of seismic profiles;Bamberger;Applied Mathematics and Optimization,1979