Gulyaeva, T.L., and Bilitza, D. Towards ISO Standard Earth Ionosphere and Plasmasphere Model.
In: "New Developments in the Standard Model", edited by R.J. Larsen, pp. 1-39, NOVA, Hauppauge, New York, 2012
[Available at https://www.novapublishers.com/catalog/product_info.php?products_id=35812]
IRI-Plas (by T.L. Gulyaeva) source and executables are available at https://www.izmiran.ru/ionosphere/weather/grif/SPIM/.