@article{10_4064_sm_66_1_37_55,
     author = {G. Folland},
     title = {Lipschitz classes and {Poisson} integrals on stratified groups},
     journal = {Studia Mathematica},
     pages = {37--55},
     publisher = {mathdoc},
     volume = {66},
     number = {1},
     year = {1979},
     doi = {10.4064/sm-66-1-37-55},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-66-1-37-55/}
}