HUGHES, P. (1976). Limit state theory for reinforced concrete design SIunits.-- Ed.2. Pitman.

HUGHES, P.B. Limit State Theory for Reinforced Concrete Design SIunits.-- Ed.2. London: Pitman, 1976.

HUGHES, P.B. Limit State Theory for Reinforced Concrete Design SIunits.-- Ed.2. Pitman, 1976.