1. Vilenkin, A.: In: 300 Years of Gravity. Hawking, S.W., Israel, W. (eds.). Cambridge: Cambridge University Press 1987
2. Aryal, M., Ford, L.H., Vilenkin, A.: Phys. Rev. D34, 2263 (1986)
3. Linet, B.: J. Gen. Rel. Grav.17, 1109 (1985)
4. Smith, A.G.: Gravitational effects of an infinite straight cosmic string on classical and quantum fields: self-forces and vacuum fluctuations. Tufts University Preprint, June 1986
5. Helliwell, T.M., Konkowski, D.A.: Phys. Rev. D34, 1918 (1986)