6Vanegas Useche,M.M.Abdel Wahab,G.A.Parker.Dynamicsof a freely rotating cutting brush subjected to variable speed L.V.Inerenational Journal of Mechanical Sciences,2008 :804-816.
7Va n e g a s U s e c h e,LV,Ab d c l Wah a b MM,P a r k e rGA.Dynamics of an unconstrained oscillatory flicking brush for roadsweeping.Journal of Sound and Vibration,2007 :778-801.