"Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames." Thermal Performance of the Exterior Envelopes of Whole Buildings XI International Conference, December 5-9, 2010. Clearwater Beach, FL, 2010. LBNL-3886E..
State-of-the-Art Highly Insulating Window Frames - Research and Market Review. Olso: INTEF Building and Infrastructure, 2007. LBNL-1133E..