Masai, E., Shinohara, S., Hara, H., Nishikawa, S., Katayama, Y., & Fukuda, M. (1999). Genetic and Biochemical Characterization of a 2-Pyrone-4,6-Dicarboxylic Acid Hydrolase Involved in the Protocatechuate 4,5-Cleavage Pathway of Sphingomonas paucimobilis SYK-6. American Society for Microbiology.

Masai, Eiji, Shouji Shinohara, Hirofumi Hara, Seiji Nishikawa, Yoshihiro Katayama, a Masao Fukuda. Genetic and Biochemical Characterization of a 2-Pyrone-4,6-Dicarboxylic Acid Hydrolase Involved in the Protocatechuate 4,5-Cleavage Pathway of Sphingomonas Paucimobilis SYK-6. American Society for Microbiology, 1999.

Masai, Eiji, et al. Genetic and Biochemical Characterization of a 2-Pyrone-4,6-Dicarboxylic Acid Hydrolase Involved in the Protocatechuate 4,5-Cleavage Pathway of Sphingomonas Paucimobilis SYK-6. American Society for Microbiology, 1999.