Dalang, Robert C.Mountford, Thomas S.2008-12-012008-12-012008-12-01199610.1214/aop/1042644712https://infoscience.epfl.ch/handle/20.500.14299/32020WOS:A1996UU51800008Brownian sheetlevel setsnondifferentiabilityNondifferentiability of curves on the Brownian sheettext::journal::journal article::research article