A mathematical model is proposed in order to describe the behaviour of mechanical systems with constraints.
@article{urn:eudml:doc:41716, title = {Sobre los sistemas mec\'anicos con enlaces.}, journal = {Collectanea Mathematica}, volume = {40}, year = {1989}, pages = {127-157}, zbl = {0712.70035}, mrnumber = {MR1094684}, language = {es}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:41716} }
Ramírez, Rafael. Sobre los sistemas mecánicos con enlaces.. Collectanea Mathematica, Tome 40 (1989) pp. 127-157. http://gdmltest.u-ga.fr/item/urn:eudml:doc:41716/