On a page such as this, from Bahcall's website, you can get links to the input parameters, and the publications describing the progressive refinements to the various standard solar models. And http://www.ap.stmarys.ca/~guenther/Level01/solar/solar_history.html [Broken] will give you a thumbnail sketch of the history behind their development, with references to the key original papers. But does anyone have a good site which describes, at a physics undergraduate university level, an overview of the conservation laws used, the energy transport equations, and the limitations wrt main sequence stars (i.e. not degenerate stars, or supernovae). If such a site also notes the key differences between stellar models and gas giant planet models, so much the better! Many thanks, in advance.