@article{10_4153_CJM_1971_062_8,
     author = {Cross, G. E.},
     title = {On the {Generality} of the {AP-Integral}},
     journal = {Canadian journal of mathematics},
     pages = {557--561},
     year = {1971},
     volume = {23},
     number = {3},
     doi = {10.4153/CJM-1971-062-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-062-8/}
}