TY  - RPRT
TI  - Simulation of electron spectra for surface analysis (SESSA) version 2.1 user's guide 
AU  - Werner, W S M
AU  - Smekal, W
AU  - Powell, C J
PY  - 2017
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST NSRDS 100-2017
DO  - 10.6028/NIST.NSRDS.100-2017
ER  -