@article{JAC_2011__33_4_a3,
     author = {Feng, Yan-Quan and Kwak, Jin Ho and Wang, Xiuyun and Zhou, Jin-Xin},
     title = {Tetravalent half-arc-transitive graphs of order $2pq$},
     journal = {Journal of Algebraic Combinatorics},
     pages = {543--553},
     publisher = {mathdoc},
     volume = {33},
     number = {4},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2011__33_4_a3/}
}