Electronic band structures

People often get annoyed when somebody cites wikipedia, but I would like to point out its less known feature: articles have references, which are often worth exploring. Though here, predictably, one of the main references is the Kittel's book. I suppose that there are more in depth treatments devoted to this subject, but it is worth noting that band structure calculations is a topic that is a) old, b) highly complex, and c) very material-specific (so one might have turn to research literature rather than books).