Ikujiro Nonaka, Ryoko Toyam. The theory of the knowledge-creating firm: subjectivity, objectivity and synthesis. Industrial and Corporate Change. 2005. 14. 419-436
Nonaka, Ikujiro, Ryoko Toyama. The Knowledge-creating theory revisited: knowledge creation as a synthesizing process. Knowledge Management Research & Practice. 2003. 1. 2-10
Nonaka, Ikujiro, Ryoko Toyama. A firm as a dialectical being: towards a dynamic theory of a firm. Industrial and Corporate Change. 2002. 11. 5. 995-1009
Nonaka, Ikujiro, Ryoko Toyama. A Knowledge-Based Theory of the Firm: Toward a New Paradigm. Global Innovation and Local Knowledge Creation: The Management Challenges. 2004
Nonaka, Ikujiro, Ryoko Toyama. Toward the Dynamic Theory of the Firm: Synthesizing Capability of a Knowledge-Basing Firm. New Forms of Global Firms and Innovations, Helsinki. 2002
Nonaka, Ikujiro, Ryoko Toyama, Akiya Nagata. A Firm as a Knowledge Creating Entity. Academy of Management, Toronto, Canada. 2000
Competence-building through International R&D: A Case in Japan. Asian Academy of Management, Hong Kong. 1998
David Methe, Jinichiro Miyabe, Ryoko Toyama. Overcoming a Standard Bearer: Challenges to NEC’s Personal Computer in Japan. Academy of Management, San Diego, CA. 1998. TIM:E1-E4