@article{GDZPPN002187051,
title = {On the solution of the variational problem of the arc length in 4-dimensinal affine space.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {253},
year = {1972},
pages = {99-103},
zbl = {0237.53005},
url = {http://dml.mathdoc.fr/item/GDZPPN002187051}
}
Wang, Ya-Yen Lee. On the solution of the variational problem of the arc length in 4-dimensinal affine space.. Journal für die reine und angewandte Mathematik, Tome 253 (1972) pp. 99-103. http://gdmltest.u-ga.fr/item/GDZPPN002187051/