@article{MS2_1972__31_166256,
     author = {B.G. Johansson},
     title = {On {Convergence} of {Spectral} {Sequences.}},
     journal = {Mathematica Scandinavica},
     pages = {89--102},
     publisher = {mathdoc},
     volume = {31},
     year = {1972},
     zbl = {0247.55015},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__31_166256/}
}