P a p y r om a n i a publications concerning paper engineering             Origamic Architecture Manual - By courtesy of Tjeerd Kuipers Papierarchitectuur Handleiding (in dutch) - By courtesy of Tjeerd Kuipers Niet bouwen, maar vouwen (article in dutch) A Study on the Boundary Conditions of 90º Paper Pop-up Structures A symmetry analysis of mechanisms in rotating rings of tetrahedra Origami by Robert Lang (video) Science of Origami Mathematicians and Artist use Algorithms to make complicated Paper Sculptures by Robert Lang   Sphere Houses in Bonbek (article in english and french; ISBN 9782810004607)