Antinio Sant’Elia: La Città Nuova / The New City (1912 – 1914)

New York University have some good resources including:

The Futurist Manifesto for Architecture

Images of architectural drawings by Sant'Elia can also be found on this webpage, such as:

Image of a Power Station concept drawing

Image of The City concept drawing

Click on image above for reviews or to buy this book about architectural thinking