TY - JOUR AU - Jay, Laurent O. AU - Negrut, Dan TI - Extensions of the HHT-$\alpha $ method to differential-algebraic equations in mechanics JO - Electronic transactions on numerical analysis PY - 2007 SP - 190 EP - 208 VL - 26 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ETNA_2007__26__a15/ LA - en ID - ETNA_2007__26__a15 ER -