1. Thomas TR (1999) Rough Surfaces. Imperial College Press, London
2. Sir Isaac Newton (1642–1727, in the New Style or Gregorian calendar, 1643–1727, in the Old Style or Julian calendar). This discovery is treated in his book: Opticks, or, a treatise of the reflections, refractions, inflections and colours, the fourth edition corrected, London W. Immys, MDCCXXX; further: Newton, Opticks, etc., a reprint from the fourth edition with a foreword by Prof. A. Einstein, Nobel laureate, and an introduction by Prof. E.T. Whittaker, Fellow of the Royal Society; McGraw-Hill, New York, 1931
3. Poisson S-D (1781–1840), Note sur le phénomène des anneaux colorés; to be found in H. de Senarmont, E. Verdet, L. Fresnel, Oeuvres complètes d“Augustin Fresnel; tome deuxième; imprimerie impériale, Paris, 1868 (in French), section XXXV, pp. 239–246, specifically page 245. This paper was presented by Poisson at the Royal Academy of Sciences in Paris on the 31st of March 1823, and published originally in: Annales de Chimie et de Physique, par MM. Gay-Lussac et Arago,tome vingt-deuxième, Paris, Crochard, 1823, pp. 337–347, specifically page 345. Later, G.G. Stokes cites this paper in The Cambridge and Dublin Mathematical Journal 4 (1849): 1–14, as the first optical description of the black spot in optical contact
4. Twyman F (1905) Proc. of the Optical Convention, pp. 50–54
5. Parker RG, Dalladay At (1917) Trans. of the Faraday Soc. 12: 305–313 Historical Patent Picture of the Contact Bonding 55