"Panel Data Analysis" entry in the Encyclopedia of Research
Methods for the Social Sciences, edited by Michael Lewis-Beck, Alan
Bryman and Tim Futing Liao, Sage Publications, 2004.
ISBN:
9780761923633
"Panel Data" entry in the Encyclopedia
of Statistical Sciences, S. Kotz, C.B. Read and D.L. Banks, editors,
John Wiley and Sons, 1998, pp. 514-517.