@article{SIGMA_2018_14_a88,
     author = {David Saunders},
     title = {On {Lagrangians} with {Reduced-Order} {Euler{\textendash}Lagrange} {Equations}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2018},
     volume = {14},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2018_14_a88/}
}