Various local stiffness characterizations of single cells using buckling nanoneedles / by Mohd Ridzuan Ahmad, author, Masahiro Nakajima, author, Seiji Kolima, author, Michio Homm, author, Toshio Fukuda, author, IEEE International Conference Robotics and Biomimetics (IEEE ROBO 2008) (2009 : Bangkok, Thailland)