@article{10_4064_sm150_1_5,
     author = {Steffen Roch},
     title = {Algebras of approximation {sequences:
Fredholm} theory in fractal algebras},
     journal = {Studia Mathematica},
     pages = {53--77},
     publisher = {mathdoc},
     volume = {150},
     number = {1},
     year = {2002},
     doi = {10.4064/sm150-1-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm150-1-5/}
}