@article{10_4064_ap81_2_6,
     author = {W. M. Mikulski},
     title = {Non-existence of some natural operators on connections},
     journal = {Annales Polonici Mathematici},
     pages = {157--166},
     year = {2003},
     volume = {81},
     number = {2},
     doi = {10.4064/ap81-2-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap81-2-6/}
}