TY  - RPRT
TI  - ESS equations sometimes do not specify an ESS.
AU  - S J Clark
PY  - 1986
DO  - 10.1016/s0022-5193(86)80248-x
UR  - https://pubmed.ncbi.nlm.nih.gov/3657184/
ID  - 3657184
ER  -