TY - JOUR TI - Unconstrained finite element for geometrical nonlinear dynamics of shells PY - 2009 AU - Coda, Humberto Breves AU - Paccola, Rodrigo Ribeiro T2 - Mathematical Problems in Engineering SN - 1024-123X UR - http://downloads.hindawi.com/journals/mpe/2009/575131.pdf PP - New York VL - 2009 SP - 1-32 ER -