Help for the designers of Online Help Systems. - Brad Mehlenbacher; Thomas M. Duffy; Jim E. Palmer; Maria Truschel; Karen Denchfield; Ann Aaron (ACM SIGCHI Bull., 1988)

Finding Information on a Menu: Linking Menu Organization to the User's Goals. - Brad Mehlenbacher; Thomas M. Duffy; Jim E. Palmer (Hum. Comput. Interact., 1989)