@article{10_4153_CJM_1967_039_8,
     author = {Bullen, P. S.},
     title = {A {General} {Perron} {Integral,} {II}},
     journal = {Canadian journal of mathematics},
     pages = {457--473},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-039-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-039-8/}
}