A Case Study on the Relationship between the Contact with Two Cultures and Self-concept in a Child from an International Marriage. Tokoha Gakuen University Research Reveiw. 2004. 25, 177-204
A case study of bicultural experience and child development- part.2 the acquisition process of two languages in child S. Tokoha Gakuen University Research Review. 2003. 24, 159-188