TY  - RPRT
TI  - Differential cross sections and angular-correlation parameters for n=3 excitations in hydrogen by electrons and positrons.
AU  - AK Katiyar
AU  - R Srivastava
PY  - 1989
DO  - 10.1103/physreva.40.1289
UR  - https://pubmed.ncbi.nlm.nih.gov/9902261/
ID  - 9902261
ER  -