@article{oai:tsukuba.repo.nii.ac.jp:00015851,
 author = {Radu, Miron and Gheorghe, Atanasiu},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {137--149},
 title = {Geometrical theory of geavitational and electromagnetic fields in higher order Lagrange spaces},
 volume = {20},
 year = {1996}
}