BAZEZEW, A. . Penalty formulation for the nonlinear dynamic analysis of a double pendulum. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት, [S. l.], v. 15, p. 47–52, 2023. Disponível em: https://ejol.aau.edu.et/index.php/ZEDE/article/view/6454. Acesso em: 10 apr. 2026.