@article{10_4064_am_22_3_373_418,
     author = {Eric Busvelle and Rachid Kharab and A. Maciejewski and Jean-Marie Strelcyn},
     title = {Numerical integration of differential equations in the presence of first integrals: observer method},
     journal = {Applicationes Mathematicae},
     pages = {373--418},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1993},
     doi = {10.4064/am-22-3-373-418},
     zbl = {0819.34008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-22-3-373-418/}
}