@article{10_4153_CJM_2009_054_5,
     author = {Ruan, Huo-Jun and Strichartz, Robert S.},
     title = {Covering {Maps} and {Periodic} {Functions} on {Higher} {Dimensional} {Sierpinski} {Gaskets}},
     journal = {Canadian journal of mathematics},
     pages = {1151--1181},
     year = {2009},
     volume = {61},
     number = {5},
     doi = {10.4153/CJM-2009-054-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2009-054-5/}
}