## Homology, Homotopy and Applications

Homology, Homotopy and Applications (HHA) is a fully refereed international journal dealing with homology and homotopy in algebra and topology and their applications to the mathematical sciences.

The Bloch invariant as a characteristic class in $B(SL_2(\mathbb {C}), \mathfrak{ T})$.Volume 5, Number 1 (2003)