@article{10_1007_s10492_012_0009_8,
     author = {Pra\v{z}\'ak, Dalibor and Rajagopal, Kumbakonam R.},
     title = {Mechanical oscillators described by a system of differential-algebraic equations},
     journal = {Applications of Mathematics},
     pages = {129--142},
     publisher = {mathdoc},
     volume = {57},
     number = {2},
     year = {2012},
     doi = {10.1007/s10492-012-0009-8},
     mrnumber = {2899728},
     zbl = {1249.34017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-012-0009-8/}
}