[ACM] Proceedings of the annual ACM conference 1976 , Houston, Texas, United States (1976) 
 Abelson, Harold (1976) Abelson, Harold "Logo graphics as a mathematical environment"
 Griswold, Ralph E. (1976) Griswold, Ralph E. "String analysis and synthesis in SL5" p.410414
 Stiles, Joe (1976) Stiles, Joe "An Interactive Macro Language Application to a Tracking Problem and to a Best Ellipsoidal Bounds Problem" pp561563

