Nishimura Kyoko. Symbiotic Interrelation between Man and Nature : What Gary Snyder's Poetry Seeks. Bulletin of Seinan Jogakuin Junior College. 2001. 48. 48. 39-42
Nishimura Kyoko. Nature in English Literature : Mary Oliver's Nature Poetry : Beyond Walden. Bulletin of Seinan Jogakuin Junior College. 2000. 47. 47. 39-48