Human Factors; Assessment & Definition of a Harmonized Minium Man-Machine Interface (MMI) for Accessing & Controlling Public Network Based Supplementary Services; Part 1 - General Approach and Summary of Findings
Human Factors; Assessment & Definition of a Harmonized Minimum Man-Machine Interface (MMI) for Accessing & Controlling Public Network Based Supplementary Servces; Part 4 - Experimental Comparison of the Effect of Categorized & Non-Categorized Formats