%0 Journal Article %T SINGULARITY ANALYSIS OF A 3-RRRR REDUNDANT SPHERICAL PARALLEL MANIPULATOR %A Soheil Zarkandi & Mohammad Reza Esmaili %J International Journal of Research and Reviews in Applied Sciences %D 2011 %I Academic Research Publishing Agency Network %U http://www.arpapress.com/Volumes/Vol6Issue1/IJRRAS_6_1_08.pdf