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• Nagarajaiah, S.; Reinhorn, A. M.; Constantinou, M. C.
  Nonlinear Dynamic Analysis of Three-Dimensional Base Isolated Structures (3D-BASIS).
  National Science Foundation, Washington, DC., August 3, 1989, 132 p.
  Identifying Number(s): NCEER-89-0019
  Keywords: Nonlinear analysis; Earthquake resistant structures; 3D-BASIS computer program; Mathematical models; Dynamic response; Ground motion; Earthquake engineering; Buildings; Base isolation; Seismic effects

• Nagarajaiaj, S.; Reinhorn, A. M.; Constantinou, M. C.
  3D-BASIS Nonlinear Dynamic Analysis of Three-Dimensional Base Isolated Structures: Part 2.
  National Science Foundation, Washington, DC., February 28, 1991, 146 p.
  Identifying Number(s): NCEER-91-0005
  Keywords: Earthquake resistant structures; 3D-BASIS computer program; Structural vibration; Springs (Elastic); Algorithms; Mathematical models; Dynamic response; Earthquake engineering; Vibration damping; Stiffness; Displacement; Vibration isolators; Bearings; Nonlinear systems; Dynamic structural analysis