@article{ARM_1968__4_4_a1,
     author = {Neuman, Franti\v{s}ek},
     title = {Centroaffine invariants of plane curves in connection with the theory of the second-order linear differential equations},
     journal = {Archivum mathematicum},
     pages = {201--216},
     publisher = {mathdoc},
     volume = {04},
     number = {4},
     year = {1968},
     mrnumber = {0267512},
     zbl = {0218.34007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1968__4_4_a1/}
}