https://doi.org/10.1351/goldbook.S05971
SI derived unit of solid @[email protected], \(\mathrm{sr}=1\).
Source:
Green Book, 2nd ed., p. 72 [Terms] [Book]
See also:
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 993 [Terms] [Paper]