Communication technology and democratic participation: "PENners" in Santa Monica. - Kendall Guthrie; Joseph Schmitz; Daehee Ryu; John Harris; Everett M. Rogers; William H. Dutton (CQL, 1990)

The PEN Project in Santa Monica: Interactive Communication, Equality, and Political Action. - Everett M. Rogers; Lori Collins-Jarvis; Joseph Schmitz (J. Am. Soc. Inf. Sci., 1994)

When opinion leaders blog: new forms of citizen interaction. - Andrea L. Kavanaugh; Than Than Zin; John M. Carroll 001; Joseph Schmitz; Manuel A. Pérez-Quiñones; Philip L. Isenhour (DG.O, 2006)

Local Groups Online: Political Learning and Participation. - Andrea L. Kavanaugh; Than Than Zin; Mary Beth Rosson; John M. Carroll 001; Joseph Schmitz; B. Joon Kim (Comput. Support. Cooperative Work., 2007)

Local Groups Online: Political Learning and Participation. - Andrea L. Kavanaugh; Than Than Zin; Joseph Schmitz; Mary Beth Rosson; B. Joon Kim; John M. Carroll 001 (Learning in Communities, 2009)