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Y. Imamura, H. Harada and H. Saiki: Embedding Substances of Pit Membranes in Softwood Tracheids and their Degradation by Enzymes, Wood Sci. Technol., 8, 243-254(1974)
Y. Imamura. H. Harada and H. Saiki: Further Study on the Development of the Bordered Pit in Coniferous Tracheids, Mokuzai Gakkaishi, 20, 157-165(1974)
Y. Imamura and H. Harada: Electron Microscopic Study on the Development of the Bordered Pit in Coniferous Tracheids, Wood Sci. Technol., 7, 189-205(1973)
