Грешка мерења — разлика између измена

* {{cite journal|jstor=1267450|title=Errors of Measurement in Statistics |last=Cochran|first=W. G.|journal=Technometrics|volume=10| date = November 1968|publisher=Taylor & Francis, Ltd. on behalf of American Statistical Association and American Society for Quality|doi=10.2307/1267450|pages=637–666}}