@article{IM_1984__76_143112,
     author = {V.G. Kac and D.H. Peterson},
     title = {Unitary structure in representations of infinite-dimensional groups and a convexity theorem.},
     journal = {Inventiones mathematicae},
     pages = {1--14},
     publisher = {mathdoc},
     volume = {76},
     year = {1984},
     zbl = {0534.17008},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__76_143112/}
}