References

• Anderson E., Bai Z., Bischof C., et al., 1992, LAPACK Users' Guide, SIAM, Philadelphia
• Backus G. E., Gilbert J.F., 1968, Geophys. J. R. Astron. Soc. 16, 169
• Christensen-Dalsgaard J., Schou J., Thompson M.J., 1990, MNRAS 242, 353 NASA ADS
• Christensen-Dalsgaard J., Thompson M.J., 1993, A&A 272, L1 NASA ADS
• Craig I.J.D., Brown J.C., 1986, Inverse Problems in Astronomy. Adam Hilger, Bristol
• Dongarra J., Bunch J.R., Moler C.B., Stewart G.W., 1979, Linpack Users' Guide, SIAM, Philadelphia
• Dongarra J., Duff I.S., Sorensen D.C., van der Vorst H.A., 1991, Solving Linear Systems on Vector and Shared Memory Computers, SIAM, Philadelphia
• Eldén L., 1977, BIT 17, 134
• Golub G.H., Van Loan C.F., 1989, Matrix Computations, 2. Ed., Johns Hopkins University Press, Baltimore
• Hanke M., Hansen P.C., 1993, Surv. Math. Ind. 3, 253
• Hansen P.C., 1994, Inverse Problems 10, 895
• IMSL Math/Library, Version 2.0, 1991
• Lawson C.L., Hanson R.J., 1974, Solving Least Squares Problems, Prentice-Hall
• Louis A.K., Maass P., 1990, Inverse Problems 6, 427.
• NAG Fortran Library Manual, Mark 15, 1991, NAG Ltd., Oxford
• Paige C.C., Saunders M.A., 1982, ACM Trans. Math. Software 8, 43
• Paige C.C., Saunders M.A., 1982, ACM Trans. Math. Software 8, 195
• Parker R.L., 1977, Ann. Rev. Earth Planet. Sci. 5, 35
• Pijpers F.P., Thompson M.J., 1992, A&A 262, L33 NASA ADS
• Pijpers F.P., Thompson M.J., 1994, A&A 281, 231 NASA ADS
• Press W.H., Teukolsky S.A., Vetterling W.T., Flannery B.P., 1992, Numerical Recipes, 2. Ed. Cambridge University Press
• Schou J., Christensen-Dalsgaard J., Thompson M.J., 1995, in: Proc. GONG'94: Helio- and Astro-seismology from Earth and Space, Ulrich R.K., Rhodes Jr. E.J., Däppen W. (eds.) Astron. Soc. Pac. Conf. Ser., San Francisco 76, 528