Ebisawa, Y., Sakai, N., Menten, K. M., Oya, Y., & Yamamoto, S. (2020). Temperature Structure of the Pipe Nebula Studied by the Intensity Anomaly of the OH 18 cm Transition. \apj, 904(2): 136, pp. 136. doi:10.3847/1538-4357/abc16f.