• Author: Johnsson, M. T. Brogardh A. Johnsson W. Engelmann
• Title: Period lengthening of theophylline on oscillatory water regulation in Avena
• Year: 1975
• Reference Type: Journal Article
• Journal/Book Title: Z. {P}flanzenphysiol.
• Volume: 76
• Pages: 238-248
• Date of Publication: Saturday, 20 December 1975