Newman, E. T.; Janis, A. I. (June 1965). "Note on the Kerr Spinning Particle Metric". Journal of Mathematical Physics. 6 (6): 915–917. Bibcode:1965JMP.....6..915N. doi:10.1063/1.1704350. https://aip.scitation.org/doi/10.1063/1.1704350
Drake, S. P.; Szekeres, P. (2000). "Uniqueness of the Newman–Janis Algorithm in Generating the Kerr–Newman Metric". General Relativity and Gravitation. 32 (3): 445–457. arXiv:gr-qc/9807001. Bibcode:2000GReGr..32..445D. doi:10.1023/A:1001920232180. S2CID 123507909. /wiki/ArXiv_(identifier)
Canonico, Rosangela; Parisi, Luca; Vilasi, Gaetano (2011). "The Newman Janis Algorithm: A Review of Some Results". Proceedings of the Twelfth International Conference on Geometry, Integrability and Quantization. 12. Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences: 159–169. doi:10.7546/giq-12-2011-159-169. S2CID 124148817. https://projecteuclid.org/euclid.pgiq/1436815617