Peter Osmon Tom Stiemerling Tony Valsamidis Andy Whitcroft Tim Wilkinson Nick Williams The Topsy Project: a Position Paper. 97-112 1992 conf/parle/1992 PARLE db/conf/parle/parle92.html#OsmonSVWWW92 http://dx.doi.org/10.1007/3-540-55599-4_83