@article{10_4153_CMB_2011_056_5,
     author = {Li, Benling and Shen, Zhongmin},
     title = {Projectively {Flat} {Fourth} {Root} {Finsler} {Metrics}},
     journal = {Canadian mathematical bulletin},
     pages = {138--145},
     year = {2012},
     volume = {55},
     number = {1},
     doi = {10.4153/CMB-2011-056-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2011-056-5/}
}