h penny nii INGENIERIA DEL SABER

http://206.204.3.133/dir_nii/nii_bio_penny.html

http://www.informatik.uni-trier.de/~ley/db/indices/a-tree/n/Nii:H=_Penny.html

http://www.wtec.org/loyola/kb/aa_bios.htm

http://www.amazon.com/s?ie=UTF8&rh=i%3Astripbooks%2Cp_27%3AH.Penny%20Nii&field-author=H.Penny%20Nii&page=1

http://www.penny-nii.com/Site/PennyNii.html

http://portal.acm.org/citation.cfm?id=66783

http://en.scientificcommons.org/h_penny_nii

http://www.thocp.net/biographies/feigenbaum_edward.htm

http://journals.cambridge.org/action/registration