↑ a et bBernard Stanford Massey, Measures in Science and Engineering : Their Expression, Relation and Interpretation, Ellis Horwood Limited, , 216 p. (ISBN0-85312-607-0)
↑ a et b(en) Carl W. Hall, Laws and Models : Science, Engineering and Technology, Boca Raton, CRC Press, , 524 p. (ISBN84-493-2018-6)