V.P. Medʹnikov, I.I. Smulʹskĭi ; otvetstvenny̆i redaktor, E.A. Grebenikov = Astronomical theory of ice ages : new approximations : solutions and challenges / V.P. Melnikov, I.I. Smulsky ; edited by E.A. Grebenikov.<br />Astronomical theory of ice ages : new approximations : solutions and challenges.