[http://www.gse.upenn.edu/faculty_research/Effects-of-Induction-and-Mentoring-RMI-Fall-2004.doc]* Portner, H.
[http://www.gse.upenn.edu/faculty_research/Effects-of-Induction-and-Mentoring-RMI-Fall-2004.doc]* Portner, H.