Otakar Gartner
Symposium on Shell Research, Delft 1961
Colin Faber
Ladislav Fischer
J. Margarit
Csonka, Pál
Portland Cement Association
C. B. Wilby
André Paduart
John McNamee
Arend Maarten Haas
Bernard Joseph Sabaroff
IASS-CSCE International Congress (1992 Canada)
Asia-Pacific Conference on Shell and Spatial Structures (1996 : Beijing, China)
Aterino Aterini
IASS Colloquium on Hanging Roofs, Continuous Metallic Shell Roofs, and Superficial Lattice Roofs (1962 Paris)
Aurel A. Beleș