@misc{indiciae5352733b746a,
  title = {Can a man-made universe be achieved by quantum tunneling without an initial singularity?},
  author = {Guth, Alan H. and Haller, K. and Caldi, D. B. and Islam, M. M. and Mallett, R. L. and Mannheim, P. D. and Swanson, M. S.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920003733},
  note = {Source identifier: 19920003733}
}