@article{ARM_2001_37_2_a1,
     author = {Risteski, Ice B.},
     title = {Reduction of the modified {Poincar\'e} differential equation to {Birkhoff} matrix form},
     journal = {Archivum mathematicum},
     pages = {103--113},
     year = {2001},
     volume = {37},
     number = {2},
     mrnumber = {1838407},
     zbl = {1090.34005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2001_37_2_a1/}
}