%0 Journal Article %T An investigation on stiffness of a 3-PSP spatial parallel mechanism with 1 flexible moving platform using invariant form %A Rezaei, Amir %A Akbarzadeh Tootoonchi, Alireza %A Akbarzadeh Totonchi, Mohammad Reza %J Mechanism and Machine Theory %@ 0094-114X %D 2012