Physical Review Style and Notation Guide 21. American Physical Society (1983, 2011). Gearchiveerd op 12 september 2012. Geraadpleegd op 23 August 2012. Deze stijlgids geeft vermenigvuldigen een hogere prioriteit dan delen, in breuken met schuine breukstreep: "When slashing fractions, respect the following conventions. In mathematical formulas this is the accepted order of operations: (1) raising to a power, (2) multiplication, (3) division, (4) addition and subtraction". Physical Review journals benadrukken ook in hun' 'Information for Authors: "Note that the solidus (/) in fractions, for example 1/2a, means 1/(2a) and not (1/2)a."
Physical Review Style and Notation Guide 21. American Physical Society (1983, 2011). Gearchiveerd op 12 september 2012. Geraadpleegd op 23 August 2012. Deze stijlgids geeft vermenigvuldigen een hogere prioriteit dan delen, in breuken met schuine breukstreep: "When slashing fractions, respect the following conventions. In mathematical formulas this is the accepted order of operations: (1) raising to a power, (2) multiplication, (3) division, (4) addition and subtraction". Physical Review journals benadrukken ook in hun' 'Information for Authors: "Note that the solidus (/) in fractions, for example 1/2a, means 1/(2a) and not (1/2)a."