RJES         

RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 1, NO. 4, PAGES 271–299, doi:10.2205/1999ES000020, 1999

Approximation approach to the solution of gravity and magnetic problems. 1. The regularization of the systems of linear algebraic equations as the main computation problem

V. N. Strakhov, and A. V. Strakhov