@article{10_4064_ap_26_2_125_133,
     author = {G. {\L}ubczonok},
     title = {On the reduction theorems},
     journal = {Annales Polonici Mathematici},
     pages = {125--133},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1972},
     doi = {10.4064/ap-26-2-125-133},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-26-2-125-133/}
}