Pearson, T. J.; Unwin, S. C.; Cohen, M. H.; Linfield, R. P.; Readhead, A. C. S.; Seielstad, G. A.; Simon, R. S.; Walker, R. C. (1981). "Superluminal expansion of quasar 3C273". Nature. 290 (5805): 365. Bibcode:1981Natur.290..365P. doi:10.1038/290365a0. S2CID26508893.;
Biretta, J. A.; Zhou, F.; Owen, F. N. (1995). "Detection of Proper Motions in the M87 Jet". The Astrophysical Journal. 447: 582. Bibcode:1995ApJ...447..582B. doi:10.1086/175901.
Biretta, John A.; Junor, William; Livio, Mario (1999). "Formation of the radio jet in M87 at 100 Schwarzschild radii from the central black hole". Nature. 401 (6756): 891. Bibcode:1999Natur.401..891J. doi:10.1038/44780. S2CID205034376.
Gubbay, J.S.; Legg, A.J.; Robertson, D.S.; Moffet, A.T.; Ekers, R.D.; Seidel, B. (1969). "Variations of Small Quasar Components at 2,300 MHz". Nature. 224 (5224): 1094–1095. Bibcode:1969Natur.224.1094G. doi:10.1038/2241094b0. S2CID4196846.
Cohen, M. H.; Cannon, W.; Purcell, G. H.; Shaffer, D. B.; Broderick, J. J.; Kellermann, K. I.; Jauncey, D. L. (1971). "The Small-Scale Structure of Radio Galaxies and Quasi-Stellar Sources at 3.8 Centimeters". The Astrophysical Journal. 170: 207. Bibcode:1971ApJ...170..207C. doi:10.1086/151204.
Whitney, AR; Shapiro, Irwin I.; Rogers, Alan E. E.; Robertson, Douglas S.; Knight, Curtis A.; Clark, Thomas A.; Goldstein, Richard M.; Marandino, Gerard E.; Vandenberg, Nancy R. (1971). "Quasars Revisited: Rapid Time Variations Observed Via Very-Long-Baseline Interferometry". Science. 173 (3993): 225–30. Bibcode:1971Sci...173..225W. doi:10.1126/science.173.3993.225. PMID17741416. S2CID20152786.
Pearson, T. J.; Unwin, S. C.; Cohen, M. H.; Linfield, R. P.; Readhead, A. C. S.; Seielstad, G. A.; Simon, R. S.; Walker, R. C. (1981). "Superluminal expansion of quasar 3C273". Nature. 290 (5805): 365. Bibcode:1981Natur.290..365P. doi:10.1038/290365a0. S2CID26508893.;
Biretta, J. A.; Zhou, F.; Owen, F. N. (1995). "Detection of Proper Motions in the M87 Jet". The Astrophysical Journal. 447: 582. Bibcode:1995ApJ...447..582B. doi:10.1086/175901.
Biretta, John A.; Junor, William; Livio, Mario (1999). "Formation of the radio jet in M87 at 100 Schwarzschild radii from the central black hole". Nature. 401 (6756): 891. Bibcode:1999Natur.401..891J. doi:10.1038/44780. S2CID205034376.
Gubbay, J.S.; Legg, A.J.; Robertson, D.S.; Moffet, A.T.; Ekers, R.D.; Seidel, B. (1969). "Variations of Small Quasar Components at 2,300 MHz". Nature. 224 (5224): 1094–1095. Bibcode:1969Natur.224.1094G. doi:10.1038/2241094b0. S2CID4196846.
Cohen, M. H.; Cannon, W.; Purcell, G. H.; Shaffer, D. B.; Broderick, J. J.; Kellermann, K. I.; Jauncey, D. L. (1971). "The Small-Scale Structure of Radio Galaxies and Quasi-Stellar Sources at 3.8 Centimeters". The Astrophysical Journal. 170: 207. Bibcode:1971ApJ...170..207C. doi:10.1086/151204.
Whitney, AR; Shapiro, Irwin I.; Rogers, Alan E. E.; Robertson, Douglas S.; Knight, Curtis A.; Clark, Thomas A.; Goldstein, Richard M.; Marandino, Gerard E.; Vandenberg, Nancy R. (1971). "Quasars Revisited: Rapid Time Variations Observed Via Very-Long-Baseline Interferometry". Science. 173 (3993): 225–30. Bibcode:1971Sci...173..225W. doi:10.1126/science.173.3993.225. PMID17741416. S2CID20152786.
Pearson, Timothy J.; Zensus, J. Anton (1987). J. Anton Zensus; Timothy J Pearson (eds.). Superluminal Radio Sources: proceedings of a workshop in honor of Professor Marshall H. Cohen, held at Big Bear Solar Observatory, California, October 28-30, 1986. Cambridge; New York: Cambridge University Press. p. 3. Bibcode:1987slrs.work....1P. ISBN9780521345606. {{cite book}}: |journal= ignored (help)
Whitney, AR; Shapiro, Irwin I.; Rogers, Alan E. E.; Robertson, Douglas S.; Knight, Curtis A.; Clark, Thomas A.; Goldstein, Richard M.; Marandino, Gerard E.; Vandenberg, Nancy R. (1971). "Quasars Revisited: Rapid Time Variations Observed Via Very-Long-Baseline Interferometry". Science. 173 (3993): 225–30. Bibcode:1971Sci...173..225W. doi:10.1126/science.173.3993.225. PMID17741416. S2CID20152786.
Pearson, T. J.; Unwin, S. C.; Cohen, M. H.; Linfield, R. P.; Readhead, A. C. S.; Seielstad, G. A.; Simon, R. S.; Walker, R. C. (1981). "Superluminal expansion of quasar 3C273". Nature. 290 (5805): 365. Bibcode:1981Natur.290..365P. doi:10.1038/290365a0. S2CID26508893.;
Biretta, John A.; Junor, William; Livio, Mario (1999). "Formation of the radio jet in M87 at 100 Schwarzschild radii from the central black hole". Nature. 401 (6756): 891. Bibcode:1999Natur.401..891J. doi:10.1038/44780. S2CID205034376.
Gubbay, J.S.; Legg, A.J.; Robertson, D.S.; Moffet, A.T.; Ekers, R.D.; Seidel, B. (1969). "Variations of Small Quasar Components at 2,300 MHz". Nature. 224 (5224): 1094–1095. Bibcode:1969Natur.224.1094G. doi:10.1038/2241094b0. S2CID4196846.
Whitney, AR; Shapiro, Irwin I.; Rogers, Alan E. E.; Robertson, Douglas S.; Knight, Curtis A.; Clark, Thomas A.; Goldstein, Richard M.; Marandino, Gerard E.; Vandenberg, Nancy R. (1971). "Quasars Revisited: Rapid Time Variations Observed Via Very-Long-Baseline Interferometry". Science. 173 (3993): 225–30. Bibcode:1971Sci...173..225W. doi:10.1126/science.173.3993.225. PMID17741416. S2CID20152786.