The creep behaviour of glass-fibre reinforced polyester resin laminates on natural weathering /
Zilvar, V.
Garston :  Building Research Station, 
1970.
Originally published as Das Kriechverhalten von glasfaserverstarkten Polyesterharzlaminaten bei Freibewitterung, in Kunstoffe, 1969, 59(12), 948-54.