Journal of Prosthetic Dentistry · 2014 · 10 citations · 18 references
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Visual and Spectrophotometric Shade Analysis of Human Teeth
S. Paul, Alina Peter, N Pietrobon et al. · Journal of Dental Research · 2002 · 511 citations
Evaluation of visual and instrument shade matching
Scott R. Okubo, Ali Kanawati, Mark W. Richards et al. · Journal of Prosthetic Dentistry · 1998 · 405 citations