References


[1] R. Penrose: Bull. Inst. Math. Appl., 10 (1974), No. 7-8,266. 

     A. L. Mackay: Sov. Phys. - Crystallogr., 26 (1981), 517; Physica, 114A (1982), 609. 


[2] D. Shechtman, I. Blech, D. Glatias and J.W. Cahn: Phys. Rev. Lett. 53 (1984), 1951. 

      D. Levine and P.J. Steinhardt: Phys. Rev. Lett., 53 (1984), 2477. 


[3] N.G. De Bruijn: Ned. Akad. Weten. Proc., Ser. A, 43 (1981), 39; ibid 53. 

      K. N. Ishihara and P.H. Shingu: J. Phys. Soc. Jpn., 55 (1986), 1795. 

      S. Yamamoto and K.N. Ishihara, private communication. 

      C.L. Henley: Phys. Rev.B, 34 (1986),797. 


[4] T. Ogawa: J.Phys.Soc. Jpn., 54 (1985),3205; in Science on Form, Eds. Y.Kato et al (1986, KTK Sci. Pub., Tokyo / Reidel); to be published in Morphology and  Growth Units of Crystals,  Proc. of Oji Intn., Seminar, 25-31 Aug., 1985), Ed. I. Sunagawa (TERRA Pub. Co., Tokyo); [Science] (Japanese edition of Scientific American), Sept. 1986, p. 10 (in Japanese, Nikkei Science, Tokyo). 
 
 

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