Paul Natorp - Detailed study by Alan Kim, from the Stanford Encyclopedia of Philosophy. - http://plato.stanford.edu/entries/natorp/
Natorp on Social Education: A Paideia for all Ages - Paper delivered at the 20th World Congress of Philosophy by Judy D. Saltzman. Explores Natorp's influence on educational theory. - http://www.bu.edu/wcp/Papers/Educ/EducSalt.htm