TY  - RPRT
TI  - Recommendation for key derivation through extraction-then-expansion 
AU  - Chen, L
PY  - 2011
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST SP 800-56c
DO  - 10.6028/NIST.SP.800-56c
ER  -