@article{JOLT_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},
     year = {1993},
     volume = {3},
     number = {2},
     doi = {10.5802/jolt.68},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.68/}
}