@article{CMH_1966__41_139321,
     author = {B. Eckmann and P.J. Hilton},
     title = {Composition {Functors} and {Spectral} {Sequences.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {187--221},
     publisher = {mathdoc},
     volume = {41},
     year = {1966},
     zbl = {0178.34401},
     url = {http://geodesic.mathdoc.fr/item/CMH_1966__41_139321/}
}