@incollection{AST_1978__52-53__47_0,
     author = {Walsh, John B.},
     title = {The local time of the {Brownian} sheet},
     booktitle = {Temps locaux},
     series = {Ast\'erisque},
     pages = {47--61},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {52-53},
     year = {1978},
     language = {en},
     url = {http://www.numdam.org/item/AST_1978__52-53__47_0/}
}