@article{10_4153_CJM_1999_053_1,
     author = {Lusztig, G.},
     title = {Subregular {Nilpotent} {Elements} and {Bases} in $K$ {-Theory}},
     journal = {Canadian journal of mathematics},
     pages = {1194--1225},
     year = {1999},
     volume = {51},
     number = {6},
     doi = {10.4153/CJM-1999-053-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-053-1/}
}