basis point, [w:] Dictionary.com [online] [dostęp 2017-12-22](ang.).
doi.org
dx.doi.org
T.J.T.J.QuinnT.J.T.J., I.M.I.M.MillsI.M.I.M., The use and abuse of the terms percent, parts per million and parts in 10n, „Metrologia”, 35 (6), 1998, s. 807–810, DOI: 10.1088/0026-1394/35/6/3(ang.).
Stephen E.S.E.SchwartzStephen E.S.E., PeterP.WarneckPeterP., Units for Use in Atmospheric Chemistry (IUPAC Recommendations 1995), „Pure & Applied Chemistry”, 67 (8–9), 1995, s. 1377–1406, DOI: 10.1351/pac199567081377(ang.).
IacopoI.GalliIacopoI. i inni, Spectroscopic detection of radiocarbon dioxide at parts-per-quadrillion sensitivity, „Optica”, 3 (4), 2016, s. 385–388, DOI: 10.1364/OPTICA.3.000385(ang.).
YvesY.TondeurYvesY., JerryJ.HartJerryJ., Ultratrace extraction of persistent organic pollutants, „Trends in Analytical Chemistry”, 28 (10), 2009, s. 1137–1147, DOI: 10.1016/j.trac.2009.07.009(ang.).
CarstenC.EngelhardCarstenC., Inductively coupled plasma mass spectrometry: recent trends and developments, „Analytical and Bioanalytical Chemistry”, 399 (1), 2011, s. 213–219, DOI: 10.1007/s00216-010-4299-y(ang.).
Brian W.B.W.PetleyBrian W.B.W., Report to the 1999 IUPAP General Assembly [online], International Union of Pure and Applied Physics, 1998 [dostęp 2016-08-01](ang.).
loc.gov
lccn.loc.gov
Daniel C.D.C.HarrisDaniel C.D.C., Quantitative Chemical Analysis, wyd. 8, New York: W.H. Freeman and Company, 2010, s. 19, 478, ISBN 978-1-4292-1815-3, LCCN2009943186(ang.).