ISO 80000-2:2009: Quantities and units—Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
['ISO 80000-2: Quantities and units—Part 2: Mathematical signs and symbols to be used in the natural sciences and technology', 'ISO 80000-3: Quantities and units—Part 3: Space and time', 'International Organization for Standardization', 'ISO 80000-2:2009: Quantities and units—Part 2: Mathematical signs and symbols to be used in the natural sciences and technology', 'ISO standard']