@article{10_4064_ap_69_3_207_215,
     author = {Jerzy Konderak},
     title = {Natural first order {Lagrangians} for immersions},
     journal = {Annales Polonici Mathematici},
     pages = {207--215},
     publisher = {mathdoc},
     volume = {69},
     number = {3},
     year = {1998},
     doi = {10.4064/ap-69-3-207-215},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-69-3-207-215/}
}