Markl, Martin: Homotopy diagrams of algebras.
(English).
In:
Slovák, Jan
and Čadek, Martin (eds.): Proceedings of the 21st Winter School "Geometry and Physics".
Circolo Matematico di Palermo, Palermo, 2002.
pp. [161]-180
Cenkl, Bohumil:
On a connection with torsion zero.
(English).Commentationes Mathematicae Universitatis Carolinae,
vol. 13
(1972),
issue 1,
pp. 31-43