TY  - RPRT
TI  - Special article: calculus breakability--fragility and durility.
AU  - S P Dretler
PY  - 1994
DO  - 10.1089/end.1994.8.1
UR  - https://pubmed.ncbi.nlm.nih.gov/8186775/
ID  - 8186775
ER  -