@article{10_4153_CJM_2011_059_8,
     author = {Dahmen, Sander R. and Yazdani, Soroosh},
     title = {Level {Lowering} {Modulo} {Prime} {Powers} and {Twisted} {Fermat} {Equations}},
     journal = {Canadian journal of mathematics},
     pages = {282--300},
     year = {2012},
     volume = {64},
     number = {2},
     doi = {10.4153/CJM-2011-059-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2011-059-8/}
}