1. [1] Paul Shanahan, P., Gregory, D.: "The Role of Communication Errors in Railway Incident Causation, People and Rail Systems," Human Factors at the heart of the Railway, pp.427-435, 2007.
2. [2] Ryo. N. et al., "Causes and Prevention of Communication errors in Railway," RTRI Report, Vol.33, No.11, pp.11-16, 2017 (in Japanese).