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 __   _      ___       _____   __   __    _____   
| || | ||   / _ \\    / ___//  \ \\/ //  / ____|| 
| '--' ||  | / \ ||   \___ \\   \ ` //  / //---`' 
| .--. ||  | \_/ ||   /    //    | ||   \ \\___   
|_|| |_||   \___//   /____//     |_||    \_____|| 
`-`  `-`    `---`   `-----`      `-`'     `----`

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Text this: Fundamentals of the physics of solids. Volume 2, Electronic properties