TY  - RPRT
TI  - Cusps or no cusps--that is not the question.
AU  - P Kirveskari
PY  - 1979
DO  - 10.1111/j.1365-2842.1979.tb00410.x
UR  - https://pubmed.ncbi.nlm.nih.gov/291701/
ID  - 291701
ER  -