@article{SPS_1976__10__194_0,
     author = {Rost, Hermann},
     title = {Skorokhod stopping times of minimal variance},
     journal = {S\'eminaire de probabilit\'es de Strasbourg},
     pages = {194--208},
     publisher = {Springer - Lecture Notes in Mathematics},
     volume = {10},
     year = {1976},
     mrnumber = {445600},
     zbl = {0339.60042},
     language = {en},
     url = {http://archive.numdam.org/item/SPS_1976__10__194_0/}
}