Eric S. Raymond, Guy L. Steele Jr.; etal. "nipple mouse". Jargon File. Retrieved 2011-07-08. Based on The New Hacker's Dictionary. MIT Press. 1996. ISBN9780262680929.
Sutter, C.; Ziefle, M (2005). "Interacting with notebook input devices: An analysis of motor performance and users' expertise". Human Factors. 47 (1). Human Factors Society: 169–187. doi:10.1518/0018720053653893. PMID15960095. S2CID8573990.
US 5570111,Robert C. Barrett; Robert S. Olyha, Jr.& Joseph D. Rutledge,"Graphical user interface cursor positioning device having a negative inertia ...",issued 1996-10-29
US 5521596,Edwin J. Selker&Joseph D. Rutledge,"Analog input device located in the primary typing area of a keyboard",issued 1996-05-28
US 5489900,Matthew F. Cali; Jerome J. Cuomo& Donald J. Mikalsenet al.,"Force sensitive transducer for use in a computer keyboard",issued 1996-02-06
US US6115030,Viktors Berstis&Thomas Guthrie Zimmerman,"Trackpoint device",issued 2000-09-05
Sutter, C.; Ziefle, M (2005). "Interacting with notebook input devices: An analysis of motor performance and users' expertise". Human Factors. 47 (1). Human Factors Society: 169–187. doi:10.1518/0018720053653893. PMID15960095. S2CID8573990.
Sutter, C.; Ziefle, M (2005). "Interacting with notebook input devices: An analysis of motor performance and users' expertise". Human Factors. 47 (1). Human Factors Society: 169–187. doi:10.1518/0018720053653893. PMID15960095. S2CID8573990.