1. The development of soil mechanics in Sweden, 1900–1925;Bjerrum;Geotechnique,1960
2. Comparison of shear strength characteristics of normally consolidated clays, Proc;Bjerrum,1960
3. Japanese Architectural Society, (JAS, 2019): Architectural Foundation Structure Design Guidelines, p.123 (in Japanese).
4. Japanese Geotechnical Society (1998). The method for obtaining undisturbed soil samples using thin-walled tube sampler with fixed piston (JGS 1221-1995), Standards of Japanese Geotechnical Society for Soil Sampling -Standards and Explanations- (English version), 1-7.
5. Japanese Geotechnical Society (2013). Method for portable cone penetration test (JGS 1431-2012), Japanese standards for geotechnical and geoenvironmental investigation methods –Standards and explanations-, 337-343, (in Japanese).