@incollection{AST_1976__40__147_0,
     author = {Misiurewicz, Michal},
     title = {A short proof of the variational principle for a $\mathbb{Z}_{+}^N$  action on a compact space},
     booktitle = {International conference on dynamical systems in mathematical physics},
     series = {Ast\'erisque},
     pages = {147--157},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {40},
     year = {1976},
     mrnumber = {444904},
     zbl = {0368.54013},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1976__40__147_0/}
}