ローカル・マグニチュード
Bolt, B. A. (1993), Earthquakes and geological discovery, Scientific American Library, ISBN 0-7167-5040-6 .
Boore, D. M. (September 1989), “The Richter scale: its development and use for determining earthquake source parameter”, Tectonophysics 166 (1-3): 1–14, http://w.daveboore.com/pubs_online/richter_scale_tectonophysics_1989.pdf
Chung, D. H.; Bernreuter, D. L. (1980), Regional Relationships Among Earthquake Magnitude Scales., https://www.osti.gov/scitech/servlets/purl/5073993/ , NUREG/CR-1457.