Analysis of free vibration of rib floor systemsArjassov, Gennadi; Pappel, Toivo; Teder, LeoBEM & FEM : 19th International Conference Mathematical Modelling in Solid Mechanics. Boundary and Finite Elements Methods, 30 May - 2 June 2001, Saint Petersburg, Russia : proceedings. Vol. 22001 / p. 47-52 : ill Analysis of free vibration of rib floor systemsArjassov, Gennadi; Pappel, Toivo; Teder, LeoBEM & FEM : 19th International Conference Mathematical Modelling in Solid Mechanics. Boundary and Finite Elements Methods, 30 May - 2 June 2001, Saint Petersburg, Russia : proceedings. Vol. 12001 / p. 29-30