@article{10_1017_S0017089505002405,
     author = {TOKIHIRO, TETSUJI and MADA, JUN},
     title = {FUNDAMENTAL {CYCLE} {OF} {A} {PERIODIC} {BOX-BALL} {SYSTEM:} {A} {NUMBER} {THEORETICAL} {ASPECT}},
     journal = {Glasgow mathematical journal},
     pages = {199--204},
     year = {2005},
     volume = {47},
     number = {A},
     doi = {10.1017/S0017089505002405},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002405/}
}