Kobulnicky & Johnson; Johnson, Kelsey E. (1999). "Signatures of the Youngest Starbursts: Optically Thick Thermal Bremsstrahlung Radio Sources in Henize 2-10". ApJ. 527 (1). ss. 154-166. arXiv:astro-ph/9907233 $2. Bibcode:1999ApJ...527..154K. doi:10.1086/308075.
Johnson (2004). "Extragalactic Ultracompact HII Regions: Probing the Birth Environments of Super Star Clusters". Astronomical Society of the Pacific Conference Series. Cilt 527. s. 322. arXiv:astro-ph/0405125 $2. Bibcode:2004ASPC..322..339J.
Astrophysical Journal, "Star Formation in R136: A Cluster of O3 Stars Revealed by Hubble Space Telescope Spectroscopy", Massey, Philip; Hunter, Deidre A., 01/1998, v.493, p.180, DOI:10.1086/305126, Bibcode: 1998ApJ...493..180M
doi.org
Kobulnicky & Johnson; Johnson, Kelsey E. (1999). "Signatures of the Youngest Starbursts: Optically Thick Thermal Bremsstrahlung Radio Sources in Henize 2-10". ApJ. 527 (1). ss. 154-166. arXiv:astro-ph/9907233 $2. Bibcode:1999ApJ...527..154K. doi:10.1086/308075.
Kobulnicky & Johnson; Johnson, Kelsey E. (1999). "Signatures of the Youngest Starbursts: Optically Thick Thermal Bremsstrahlung Radio Sources in Henize 2-10". ApJ. 527 (1). ss. 154-166. arXiv:astro-ph/9907233 $2. Bibcode:1999ApJ...527..154K. doi:10.1086/308075.
Johnson (2004). "Extragalactic Ultracompact HII Regions: Probing the Birth Environments of Super Star Clusters". Astronomical Society of the Pacific Conference Series. Cilt 527. s. 322. arXiv:astro-ph/0405125 $2. Bibcode:2004ASPC..322..339J.
Astrophysical Journal, "Star Formation in R136: A Cluster of O3 Stars Revealed by Hubble Space Telescope Spectroscopy", Massey, Philip; Hunter, Deidre A., 01/1998, v.493, p.180, DOI:10.1086/305126, Bibcode: 1998ApJ...493..180M