%0 Journal Article %A Frank Neumann %A Markus Szymik %T Preludes to the Eilenberg–Moore and the Leray–Serre spectral sequences %J Documenta mathematica %D 2024 %P 1319-1339 %V 29 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/dm/978/ %R 10.4171/dm/978 %F 10_4171_dm_978