References for the Berger orbital variations data:


Berger, A., 1978.  Long-term variations of daily insolation and Quaternary
   climatic changes.   Journal of Atmospheric Science, 35(12), pp 2362-2367.

Berger, A., 1978.  A simple algorithm to compute long term variations of 
   daily or monthly insolation.   Contribution No. 18, Universite Catholique
   de Louvain, Institut d'Astronomie et de Geophysique, G. Lemaitre,
   Louvain-la-Neuve, B-1348  Belgique.

Berger A. and Loutre M.F., 1991, Insolation values for the climate of the last
   10 million of years. Quaternary Sciences Review, Vol. 10 No. 4 pp. 297-317,
   1991.


The data are also published in:


Berger, A., 1978.  Numerical values of the elements of the Earth's orbit
   from 5,000,000 YBP to 1,000,000 YAP.  (astronomical solution of Berger,
   1978).  Contribution No. 35, Universite Catholique de Louvain, 
   Institute d'Astronomie et de Geophysique, G. Lemaitre, Louvain-la-Neuve,
   B-1348 Belgique.

Berger, A., 1978.  Numerical values of mid-month insolation from 1,000,000
   YBP to 100,000 YAP (astronomical solution of Berger, 1978).   Contribution
   No. 36, Universite Catholique de Louvain, Institute d'Astronomie et de 
   Geophysique, G. Lemaitre, Louvain-la-Neuve, B-1348, Belgique. 

Berger A. and Loutre M.F., 1991, Insolation values for the climate of the last
   10 million of years. Quaternary Sciences Review, Vol. 10 No. 4 pp. 297-317,
   1991.