@article{10_4153_CJM_1968_061_4,
     author = {Singh, K. D. and Lane, N. D.},
     title = {Union and {Extension} of {Arcs} of {Cyclic} {Order} {Three}},
     journal = {Canadian journal of mathematics},
     pages = {629--638},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-061-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-061-4/}
}