Per Ullidtz
J. Carswell
G. J. Chong
National Research Council (US)
William Kenis
K. R. Peattie
F. W. Jung
European Symposium Euroflex (1993 Lisbon, Portugal)
Construction Engineering Research Laboratory.
Haiping Zhou
Ludo Zanzotto
Egon Horak
Gomes Correia
J. M. Golden
D. A. Morian
Ponniah E. Joseph
Douglas A. Frederick
Carl L. Monismith
Alberto Garcia-Diaz