TY  - RPRT
TI  - The unbreakable stone?
AU  - J Plawner
AU  - B V Surya
AU  - M Rothberg
PY  - 1987
DO  - 10.1016/0090-4295(87)90507-3
UR  - https://pubmed.ncbi.nlm.nih.gov/3564214/
ID  - 3564214
ER  -