Paul Müller,
"A Simplification in the Proof of the Non-isomorphism between $H1(\delta)$ and $H1(\delta2)$"
, in Studia Mathematica, Nummer 150, 2001, ISSN: 1730-6337
Original Titel:
A Simplification in the Proof of the Non-isomorphism between $H1(\delta)$ and $H1(\delta2)$
Forschungs-