@article{JEMS_2017_19_8_a6,
     author = {Shrawan Kumar},
     title = {Positivity in $T$-equivariant $K$-theory of flag varieties associated to {Kac{\textendash}Moody} groups},
     journal = {Journal of the European Mathematical Society},
     pages = {2469--2519},
     publisher = {mathdoc},
     volume = {19},
     number = {8},
     year = {2017},
     doi = {10.4171/jems/722},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/722/}
}