1. Aubry M-P, Van Couvering J, Berggren W, Steininger F (2000) Should the golden spike glitter? Episodes 23(3):203–210
2. BIPM (2006) The International System of Units (SI). Bureau International des Poids et Mesures, 8th Edn. https://www.bipm.org/utils/common/pdf/si_brochure_8.pdf
3. BIPM (2019a) The International System of Units (SI). Bureau International des Poids et Mesures, 9th Edn. https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9-EN.pdf
4. BIPM (2019b) A concise summary of the international system of units (SI). Bureau International des Poids et Mesures’ https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9-concise-EN.pdf
5. Bokulich A (2014) Pluto and the ‘Planet Problem’: folk concepts and natural kinds in astronomy. Perspect Sci 22(4):464–490