T.S. Amarasinghe, R.P. Illeperuma, N. Seki, T. Sumiyoshi 
                                T.S. Amarasinghe, R.P. Illeperuma, N. Seki, T. Sumiyoshi (2019). Mental and physical health status of the school children in Niigata prefecture – Japan: a preliminary study. Book of Abstracts of the 7th Conference on Sri Lanka – Japan Collaborative Research: pp21 
                                Publication year: 2021