@article{10_4153_CJM_1998_006_0,
     author = {Izuchi, Keiji and Matsugu, Yasuo},
     title = {A {\ensuremath{\varphi}-Invariant} {Subspaces} on the {Torus}},
     journal = {Canadian journal of mathematics},
     pages = {99--133},
     year = {1998},
     volume = {50},
     number = {1},
     doi = {10.4153/CJM-1998-006-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1998-006-0/}
}