A Multimodal Robot for Perching and Climbing on Vertical Outdoor Surfaces. - Morgan T. Pope; Christopher W. Kimes; Hao Jiang 002; Elliot Wright Hawkes; Matthew A. Estrada; Capella F. Kerst; William R. T. Roderick; Amy Kyungwon Han; David L. Christensen; Mark R. Cutkosky (IEEE Trans. Robotics, 2017)