Crowther, Paul A. et al. (2016-05). “The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far-ultraviolet spectroscopic census and the origin of He II λ1640 in young star clusters”. Monthly Notices of the Royal Astronomical Society458 (1): 624–659. arXiv:1603.04994. Bibcode: 2016MNRAS.458..624C. doi:10.1093/mnras/stw273.
Crowther, P. A.; Schnurr, O.; Hirschi, R.; Yusof, N.; Parker, R. J. et al. (2010-10). “The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 M⊙ stellar mass limit”. Monthly Notices of the Royal Astronomical Society408 (2): 731–751. arXiv:1007.3284. Bibcode: 2010MNRAS.408..731C. doi:10.1111/j.1365-2966.2010.17167.x.
Crowther, Paul A. et al. (2016-05). “The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far-ultraviolet spectroscopic census and the origin of He II λ1640 in young star clusters”. Monthly Notices of the Royal Astronomical Society458 (1): 624–659. arXiv:1603.04994. Bibcode: 2016MNRAS.458..624C. doi:10.1093/mnras/stw273.
Crowther, P. A.; Schnurr, O.; Hirschi, R.; Yusof, N.; Parker, R. J. et al. (2010-10). “The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 M⊙ stellar mass limit”. Monthly Notices of the Royal Astronomical Society408 (2): 731–751. arXiv:1007.3284. Bibcode: 2010MNRAS.408..731C. doi:10.1111/j.1365-2966.2010.17167.x.
Crowther, Paul A. et al. (2016-05). “The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far-ultraviolet spectroscopic census and the origin of He II λ1640 in young star clusters”. Monthly Notices of the Royal Astronomical Society458 (1): 624–659. arXiv:1603.04994. Bibcode: 2016MNRAS.458..624C. doi:10.1093/mnras/stw273.
Crowther, P. A.; Schnurr, O.; Hirschi, R.; Yusof, N.; Parker, R. J. et al. (2010-10). “The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 M⊙ stellar mass limit”. Monthly Notices of the Royal Astronomical Society408 (2): 731–751. arXiv:1007.3284. Bibcode: 2010MNRAS.408..731C. doi:10.1111/j.1365-2966.2010.17167.x.