1. Engeström, Y. 1987. Learning by expanding: An activity-theoretical approach to developmental research. Orienta-Konsultit: Helsinki.
2. Engeström, Y. 2008. From teams to knots: Activity-theoretical studies of collaboration and learning at work. Cambridge: Cambridge University Press.
3. Kada, Y. 2000. Seibutsu-tayousei to bunka no tayousei—Mizube-kankyo no jissenteki-hozen-ron ni mukete [Biodiversity and cultural diversity—Toward a practical methodology for conserving waterfront environments]. In No-san-gyoson to seibutsu-tayousei [Rural villages and biodiversity], ed. T. Udagawa, 134–150. Tokyo: Ie-no-hikari Association. (In Japanese).
4. Kada, Y. 2001. Chiiki-shakai de no hakubutsukan riyo no jissen-teki tenkai no kanousei—Biwako-Hakubutsukan e no raikan ga kenmin ni motarasu hakubutsukan-image kara nani wo tenbo dekiru no ka [Possibility of practical development of museum utilizations in local areas—What can be put in perspective based on the visitors’ images of Lake Biwa Museum]. In Shisaku to site no hakubutsukan no jissen-teki hyoka –Biwako-Hakubutsukan no Keizai-teki, Bunka-teki, Shakai-teki kouka no kenkyu [Practical evaluation of a museum as a political measure—Studies of economic, cultural, and social effects of Lake Biwa Museum], ed. Murayama, H. 138–146. Tokyo: Yuzankaku. (In Japanese).
5. Kada, Y. 2012. Chiji wa nani ga dekiru no ka—“Nihon byou” no chiryou wa chiiki kara [What can a governor do?—Japanese disease is cured in a local area]. Nagoya: Fubaisha. (In Japanese).