UNIVERSAL SOFTWARE SYSTEM “STADYO” FOR THE NUMERICAL SOLUTION OF LINEAR AND NONLINEAR PROBLEMS OF THE FIELD THEORY, STATICS, STABILITY AND DYNAMICS OF SPATIAL COMBINED SYSTEMS: GENERAL PARAMETERS AND SUPERELEMENTAL FEATURES Journal title: International Journal for Computational Civil and Structural Engineering Authors: Alexander M. Belostotsky, Alexey L. Potapenko, Pavel A. Akimov Subject(s):