@article{CM_1967__18_1-2_25_0,
     author = {Ruston, A. F.},
     title = {Fredholm formulae and the {Riesz} theory},
     journal = {Compositio Mathematica},
     pages = {25--48},
     publisher = {P. Noordhoff N. V., Groningen},
     volume = {18},
     number = {1-2},
     year = {1967},
     mrnumber = {221331},
     zbl = {0184.16102},
     language = {en},
     url = {http://www.numdam.org/item/CM_1967__18_1-2_25_0/}
}