@misc{10_4153_CMB_1975_066_0,
     title = {Contraction {Property} of the {Operator} of {Integration}},
     journal = {Canadian mathematical bulletin},
     pages = {367--369},
     year = {1975},
     volume = {18},
     number = {3},
     doi = {10.4153/CMB-1975-066-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-066-0/}
}