Kasal, Bo (2012). "Hybrid materials in construction"(PDF). Forum holzbau. Europäischer Kongress für effizientes Bauen mit Holz 2012. Retrieved 2016-12-25.
geolam.com
Wada, Yasuhiko (1994). "LCCO2 calculation"(PDF). Wood Plastic Recycled Composite Industrial Committee Japan. Archived from the original(PDF) on 2016-12-25. Retrieved 2012-01-01.