I found the paper written by S. Peter Worden, "ON SELF-LICKING ICE CREAM CONES" please note his position at the time of the presentation. He is currently the Director of NASA's Ames Research Center at Moffett Field, Calif.
I am still working on an updated treatise on the subject with specific focus on U.S. Military Night Vision Procurement perhaps called: "SELF-LICKING ICE CREAM CONES IN THE DARK".