Walters, Simon, 2008, "Brown faces disaster in Crewe by-election as pollshows 10% swing to Tories", Daily Mail, 11 May 2008.(http://www.dailymail.co.uk).
Walker,JamesL.,1980,“ChangesinEEG RhythmsDuringTelevisionViewing:Preliminary Comparisons with Reading and OtherTasks”,PerceptualandMotorSkills51(1):255-261.
Voss,D.,Gelman,A.,andKing,G.1995,"PreelectionSurveyMethodology:Details from EightPollingOrganizations,1988and1992."PublicOpinionQuarterly59(1):98-132.
Rosenbaum,P.andRubin,D.B.,1984,“ReducingBiasinObservationalStudiesUsing Subclassification on thePropensity Score”,JournaloftheAmericanStatisticalAssociation79:516-524.
Mokrzycki,Michael,Keeter,ScottandKennedy,Courtney,2009,“Cell-Phone-Only Voters in the 2008 ExitPolland Implications forFutureNoncoverageBias",PublicOpinionQuarterly73(5):845-865.
Belli,RobertF.,Moore,SeanE andVanHoewyk,John,2006."AnExperimentalComparison ofQuestion Forms Used to Reduce VoteOverreporting.",ElectoralStudies25:751-759.