@article{MAN_1972__198_162294,
     author = {Surjit Singh Khurana},
     title = {Barycenters, {Extreme} {Points,} and {Strongly} {Extreme} {Points.}},
     journal = {Mathematische Annalen},
     pages = {81--84},
     publisher = {mathdoc},
     volume = {198},
     year = {1972},
     zbl = {0227.46004},
     url = {http://geodesic.mathdoc.fr/item/MAN_1972__198_162294/}
}