1. On the Magnetic properties of superconductors of the second group;Abrikosov;Sov. Phys. JETP,1957
2. Cosmological density fluctuations produced by vacuum strings;Vilenkin;Phys. Rev. Lett.,1981
3. Strings in SO(10);Kibble;Phys. Lett. B,1982
4. Gauge fields with unified weak, electromagnetic, and strong interactions;'t Hooft,1975
5. Vortices and quark confinement in nonabelian gauge theories;Mandelstam;Phys. Rep.,1976