TY  - RPRT
TI  - Recommendation for digital signature timeliness 
AU  - Barker, E B
PY  - 2009
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST SP 800-102
DO  - 10.6028/NIST.SP.800-102
ER  -