1. Irnich W: “Engineering concepts of pacemaker electrodes.” Pacemaker technology Ed Springer Verlag Pub 1975.
2. Stokes K, Cobian K, and Co: Polyurethane insulators, a design approach to small pacing leads. Proceeding VI World Symposium on Cardiac Pacing, Pace Symp, 28–2,1979. - C Meere Ed.
3. Stokes K: Polyurethane lead insulation: a study in biostability, Medtronom 1981: n° 12.
4. Stokes K: Isolant en polyurethane, Medtronom 1981: n° 11.
5. Ploger G, Castet M, Jacquemart JF: Clinical Experience with 300 polyurethane pacing leads, RBM vol 4, n° 5, page 419.