Khangulyan, D., Koldoba, A. V., Ustyugova, G. V., Bogovalov, S. V., & Aharonian, F. (2018). On the Anomalously Large Extension of the Pulsar Wind Nebula HESS J1825-137. Astrophysical Journal, 860(1): 59. doi:10.3847/1538-4357/aac20f.