• Saddle-shaped prestressed networks with rigid or flexible contour structuresKulbach, ValdekSpatial structures in new and renovation projects of buildings and construction : theory, investigations, design , erection : proceedings International Congress ICSS-98, June 22-26, 1998. Vol. II1998 / p. 485-492 : ill https://www.ester.ee/record=b5412713*est