Nisizawa K, Yamaguchi T, Handa N, Maeda M, Yamazaki H (novembro de 1963). "Chemical nature of a uronic acid-containing polysaccharide in the peritrophic membrane of the silkworm". Journal of Biochemistry (Japan: Oxford University Press for Japanese Biochemical Society) 54: 419–426. ISSN0021-924X. PMID14089735.
Nisizawa K, Yamaguchi T, Handa N, Maeda M, Yamazaki H (novembro de 1963). "Chemical nature of a uronic acid-containing polysaccharide in the peritrophic membrane of the silkworm". Journal of Biochemistry (Japan: Oxford University Press for Japanese Biochemical Society) 54: 419–426. ISSN0021-924X. PMID14089735.