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The influence of free variables and Lipschitz exponent on the smoothness of CHFIS is demonstrated by considering interpolation data generated from a sample surface. <\/jats:p>","DOI":"10.1142\/s0218127409024098","type":"journal-article","created":{"date-parts":[[2009,10,26]],"date-time":"2009-10-26T10:57:03Z","timestamp":1256554623000},"page":"2321-2333","source":"Crossref","is-referenced-by-count":18,"title":["SMOOTHNESS OF COALESCENCE HIDDEN-VARIABLE FRACTAL INTERPOLATION SURFACES"],"prefix":"10.1142","volume":"19","author":[{"given":"G. 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