TY  - RPRT
TI  - Finite-difference-pseudopotential method: Electronic structure calculations without a basis.
AU  - JR Chelikowsky
AU  - N Troullier
AU  - Y Saad
PY  - 1994
DO  - 10.1103/physrevlett.72.1240
UR  - https://pubmed.ncbi.nlm.nih.gov/10056658/
ID  - 10056658
ER  -