1. Track groups II;Barrat,1955
2. Algebraic Homotopy;Baues,1989
3. Combinatorial Homotopy and 4-Dimensional CW-complexes;Baues,1991
4. Quadratic functors and metastable homotopy;Baues;J. Pure Appl. Algebra,1994
5. Homotopy Type and Homotopy;Baues,1996