TY - JOUR TI - Perceptual control and layered protocols in interface design: I. Fundamental concepts T2 - International Journal of Human-Computer Studies VL - 50 IS - 6 SP - 489 EP - 520 AU - FARRELL, P.S.E. and HOLLANDS, J.G. and TAYLOR, M.M. and GAMBLE, H.D. PB - Elsevier BV PY - 1999 PY - 1999 LA - English SN - 1071-5819 UR - http://dx.doi.org/10.1006/ijhc.1998.0259 UR - https://katalog.ub.uni-leipzig.de/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTAwNi9pamhjLjE5OTguMDI1OQ ER -