@article{10_4153_CMB_1980_018_0,
     author = {Kreyszig, Erwin},
     title = {Function {Theoretic} {Integral} {Operator} {Methods} for {Partial} {Differential} {Equations(1)}},
     journal = {Canadian mathematical bulletin},
     pages = {127--135},
     year = {1980},
     volume = {23},
     number = {2},
     doi = {10.4153/CMB-1980-018-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1980-018-0/}
}