@article{PORMA_1988__45_1_115607,
     author = {Ghori, Q.K.},
     title = {Equations of motion of nonlinear nonholonomic systems with variable masses},
     journal = {Portugaliae mathematica},
     pages = {49--58},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {1988},
     mrnumber = {0952797},
     zbl = {0647.70016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1988__45_1_115607/}
}