IUPAC, Compendium of Chemical Terminology, 2a ed. ("The Gold Book") (1997). Versió corregida en línia: (2006–) "standard state" (en anglès).
IUPAC, Compendium of Chemical Terminology, 2a ed. ("The Gold Book") (1997). Versió corregida en línia: (2006–) "standard pressure" (en anglès).
IUPAC, Compendium of Chemical Terminology, 2a ed. ("The Gold Book") (1997). Versió corregida en línia: (2006–) "standard conditions for gases" (en anglès).
IUPAC, Compendium of Chemical Terminology, 2a ed. ("The Gold Book") (1997). Versió corregida en línia: (2006–) "standard solution" (en anglès).
Mills, I. M. (1989) "The choice of names and symbols for quantities in chemistry". Journal of Chemical Education (vol. 66, number 11, November 1989 p. 887–889) [Note that Mills (who was involved in producing a revision of Quantities, units and symbols in physical chemistry) refers to the symbol ⊖ (Unicode 2296 "Circled minus" as displayed in http://www.unicode.org/charts/PDF/U2980.pdf) as a plimsoll symbol although it lacks an extending bar in the printed article. Mills also says that a superscript zero is an equal alternative to indicate "standard state", though a degree symbol (°) is used in the same article]
