Wei Zhou Chee-Meng Chew Geok-Soon Hong Property analysis forseries MR-fluid actuator system. 560-565 2004 RAM http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=30991&arnumber=1438981&count=107&index=99 conf/ram/2004 db/conf/ram/ram2004.html#ZhouCH04