1. Alonso, J.M.: Fibrations that are cofibrations. Proc. Am. Math. Soc. 87(4), 749–753 (1983)
2. Anel, M., Biedermann, G., Finster, E., Joyal, A.: A Generalized Blakers–Massey Theorem. arXiv (2017).
arXiv:1703.09050
3. Berrick, A.J., Casacuberta, C.: A universal space for plus-constructions. Topology 38(3), 467–477 (1999)
4. Berrick, A.J.: An approach to algebraic K-theory. Research Notes in Mathematics 56. Pitman (Advanced Publishing Program), Boston, Mass.-London (1982)
5. Hausmann, J.-C., Husemoller, D.: Acyclic maps. Enseign. Math. (2) 25(1–2), 53–75 (1979)