1. Akiyama, K.: 1962, “Publ.Astron.Soc. Japan” 14, pp.164–197
2. Belyaev, N.A. and Chebotarev, G.A.: 1968, Astron.Circ. Moscow No.480, Aug. 22, 1968.
3. Brouwer, D. and van Woerkom, A. J. J.: 1950, Astron. Papers American Ephemeris Washington, Vol.13, part 2.
4. Chebotarev, G.A., Belyaev, N.A., and Eremenko,R.P.: 1974, IAU Symposium No. 62, pp. 63–69.
5. Cohen, C.J., Hubbard, E.C., and Oesterwinter, C.: 1973, Astron. Papers American Ephemeris Washington, Vol.22, part 1.