@article{BCP_2002__58_1_282214,
     author = {Julia Hartmann},
     title = {Invariants and differential {Galois} groups in degree four},
     journal = {Banach Center Publications},
     pages = {79},
     publisher = {mathdoc},
     volume = {58},
     number = {1},
     year = {2002},
     zbl = {1030.12003},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/BCP_2002__58_1_282214/}
}