Utzon exercise, other things to look at

You could do worse than looking at work by the following Architects:

Jørn Utzon (obviously)
Sigurd Lewerentz, especially Janne Ahlin's book
Rafael Moneo
Paulo Mendes da Rocha
Eladio Dieste

and the following Engineers:

Ove Arup (obviously)
Cecil Balmond (Arup)
Pier Luigi Nervi
Felix Candela

Also have a look at the Architects in right hand column