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Kingston K. L. Mak and Siu Yuen Chan (2003)
Epidermal Growth Factor as a Biologic switch in Hair Growth Cycle
Journal of Biological Chemistry; - Vol 278 No 28 pp 26120-26126.

D. J. E. Housley, P. J. Venta (2006)
The long and the short of it: evidence that FGF5 is a major determinant of canine 'hair'-itability
Animal Genetics 37 (4), 309–315.

Some updates in coat lenght area, two more genes identified:

Science. 2009 Oct 2;326(5949):150-3. Epub 2009 Aug 27.
Coat variation in the domestic dog is governed by variants in three genes.

Cadieu E, Neff MW, Quignon P, Walsh K, Chase K, Parker HG, Vonholdt BM, Rhue A, Boyko A, Byers A, Wong A, Mosher DS, Elkahloun AG, Spady TC, André C, Lark KG, Cargill M, Bustamante CD, Wayne RK, Ostrander EA.

National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA.
Abstract

Coat color and type are essential characteristics of domestic dog breeds. Although the genetic basis of coat color has been well characterized, relatively little is known about the genes influencing coat growth pattern, length, and curl. We performed genome-wide association studies of more than 1000 dogs from 80 domestic breeds to identify genes associated with canine fur phenotypes. Taking advantage of both inter- and intrabreed variability, we identified distinct mutations in three genes, RSPO2, FGF5, and KRT71 (encoding R-spondin-2, fibroblast growth factor-5, and keratin-71, respectively), that together account for most coat phenotypes in purebred dogs in the United States. Thus, an array of varied and seemingly complex phenotypes can be reduced to the combinatorial effects of only a few genes.