1. Aki, K. and Richards, P.G., Quantitative Seismology: Theory and Methods, vol. 2, San Francisco: Freeman, 1980.
2. Aki, K., Christoffersson, A., and Husebye, E.S., Determination of the three-dimensional seismic structures of the lithosphere, J. Geophys. Res., 1976, vol. 82, no. 2, pp. 277–296.
https://doi.org/10.1029/JB082i002p00277
3. Alekseev, A.S., Some inverse problems of the theory of wave propagation, Izv. Akad. Nauk SSSR, 1962, vol. 11, pp. 1514–1531.
4. Alekseev, A.S., Lavrent’ev, M.M., Mukhometov, R.G., and Romanov, V.G., A numerical method of solving the three-dimensional inverse kinematic seismological problem, in Matematicheskie problemy geofiziki (Mathematical Problems of Geophysics), Novosibirsk: Vychisl. Tsentr Sib. Otd. Akad. Nauk SSSR, 1969, vol. 1, pp. 179–201.
5. Alekseev, A.S., Lavrent’ev, M.M., Mukhometov, R.G., Nersesov, I.L., and Romanov, V.G., A numerical method of determining upper mantle structure, in Matematicheskie problemy geofiziki (Mathematical Problems of Geophysics), Novosibirsk: Vychisl. Tsentr Sib. Otd. Akad. Nauk SSSR, 1971, vol. 2, pp. 143–165.