%0 Journal Article %T Effects of polarity on the friction and wear of collector shoes deployed in a metro traction system %A Dong, Lin %A Zhong, Wen %A Chen, Guang Xiong %A Lewis, Roger %J Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit %V 228 %N 3 %P 323-330 %@ 0954-4097 %D 2014-03-01 %I SAGE Publications %~ DeepDyve