TY  - RPRT
TI  - Double-layer color effects in porcelain systems.
AU  - W J O'Brien
AU  - W M Johnston
AU  - F Fanian
PY  - 1985
DO  - 10.1177/00220345850640061801
UR  - https://pubmed.ncbi.nlm.nih.gov/3858320/
ID  - 3858320
ER  -