Bergemann, M., Kudritzki, R.-P., Plez, B., Davies, B., Lind, K., & Gazak, Z. (2012). Red supergiant stars as cosmic abundance probes: NLTE effects in J-band iron and titanium lines. The Astrophysical Journal, 751(2): 156, pp. 1-11. doi:10.1088/0004-637X/751/2/156.