@article{JLT_1993_3_2_a6,
     author = {G. Czichowski},
     title = {Geometrical {Aspects} of {<em>SL(2)</em>-Invariant} {Second} {Order} {Ordinary} {Differential} {Equations}},
     journal = {Journal of Lie theory},
     pages = {231--238},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1993},
     url = {http://geodesic.mathdoc.fr/item/JLT_1993_3_2_a6/}
}