The screening of colour charge in numerical hopping parameter expansion Joos, H. Montvay, I. 1983 - DESY EPflicht - frei zugänglich
1+1-dimensional quantum electrodynamics as an illustration of the hypothetical structure of quark field theory Becher, P. Joos, H. 1977 - DESY EPflicht - frei zugänglich
Electromagnetic properties of hadrons in a relativistic quark model Böhm, M. Joos, H. Krammer, M. 1974 - DESY EPflicht - frei zugänglich