@Unpublished{Riv99b,
author = { Ronald L. Rivest },
title = { Description of the {LCS35} Time Capsule Crypto-Puzzle },
date = { 1999-04 },
note = { Unpublished note. },
eventtitle = { LCS35 },
eventdate = { 1999-04-12/1999-04-14 },
venue = { Cambridge, MA },
urla = { related-paper:RSW96 },
urlb = { Dan-Bricklin's-LCS35-page },
OPTmonth = { April 4, },
OPTyear = { 1999 },
}