@article{734243,
      author = {Qian, Dianwei, and Yi, Jianqiang,},
      url = {http://library.usi.edu/record/734243},
      title = {Hierarchical sliding mode control for under-actuated  cranes design, analysis and simulation / [electronic  resource] :},
      recid = {734243},
      pages = {1 online resource.},
}