% General references.

Hollerbach, J.M., ``Locomotion interfaces,'' in: {\it Handbook of
Virtual Environments Technology,} K.M. Stanney, ed., Lawrence
Erlbaum Associates, Inc., June 8, 1999, in press.

Hollerbach, J.M., Thompson, W.B., and Shirley, P., ``The convergence of
robotics, vision, and computer graphics for user information,'' {\it
Intl.\ J.\ Robotics Research, 18,} 1999, pp. 1088-1100.

% Treadport references.

http://www.cs.utah.edu/~jmh/Locomotion.html

Christensen, R., Hollerbach, J.M., Xu, Y., and Meek, S., ``Inertial
force feedback for the Treadport locomotion interface,'' {\it Presence:
Teleoperators and Virtual Environments, 9,} 2000, pp. 1-14.

Hollerbach, J.M., Xu, Y., Christensen, R., and Jacobsen, S.C.,
``Design specifications for the second generation Sarcos Treadport
locomotion interface,'' {\it Haptics Symposium, Proc. ASME Dynamic
Systems and Control Division, DSC-Vol. 69-2,} Orlando, Nov. 5-10,
2000, pp. 1293-1298.

Mills, R., Hollerbach, J.M., and Thompson, W.B., ``The biomechanical
fidelity of slope simulation on the Sarcos Treadport using whole-body
force feedback,'' {\it Experimental Robotics VII,} D. Rus and
S. Singh, eds., Springer-Verlag London, 2001, in press

Tristano, D., Hollerbach, J.M., and Christensen, R., ``Slope display
on a locomotion interface,'' {\it Experimental Robotics VI,}
P. Corke and J. Trevelyan, eds., Springer-Verlag London, 2000,
pp. 193-201.

Vijayakar, A., and Hollerbach, J.M., ``Effect of turning strategy on
maneuvering ability using the Treadport locomotion interface,''
{\it Presence:  Teleoperators and Virtual Environments,} submitted.

% Other references.

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\date{1997}
\pages{213-221}

\auth{Iwata, H.}
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\conf{Robotics Research: the Ninth International Symposium} 
\editors{J. Hollerbach and D. Koditschek}
\publ{Springer-Verlag, London}
\date{2000a}
\pages{275-282}

\auth{Iwata, H.}
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\conf{Proc. IEEE Virtual Reality 2000}
\city{New Brunswick, NJ}
\month{March 18-22}
\date{2000b}
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\auth{Iwata, H., and Yoshida, Y.}
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\jour{Presence}
\vol{8}
\date{1999}
\pages{587-597}

\auth{Noma, H., and Miyasato, T.}
\paper{Design for locomotion interface in a large scale virtual
environment.  ATLAS: ATR Locomotion INterface for Active Self Motion}
\conf{Proc. ASME Dynamic Systems and Control Division}
\vol{DSC-Vol. 64}
\date{1998}
\pages{111-118}

\auth{Noma, H., Sugihara, T., and Miyasato, T.}
\paper{Development of ground surface simulator for tel-E-merge system}
\conf{Proc. IEEE Virtual Reality 2000}
\city{New Brunswick, NJ}
\month{March 18-22}
\date{2000}
\pages{217-224}

{\sc Templeman, J.~N., Denbrook, P.~S., and Sibert, L.~E.}
\newblock Virtual locomotion: Walking in place through virtual environments.
\newblock {\em \Presence 8}, 6 (1999), 598--617.