David G. Novick, Oscar D. Andrade, Nathaniel Bean. The micro-structure of use of help. In Brad Mehlenbacher, Aristidis Protopsaltis, Ashley Williams, Shaun Slattery, editors, Proceedings of the 27th Annual International Conference on Design of Communication, SIGDOC 2009, Bloomington, Indiana, USA, October 5-7, 2009. pages 97-104, ACM, 2009. [doi]
Abstract is missing.