SPIDAR-S: Haptic Device Attached to the Smartphone. - Motonori Toshima; Katsuhito Akahane; Makoto Sato (AsiaHaptics, 2014)

SPIDAR-S: A Haptic Interface for Mobile Devices. - Shuhan Ma; Motonori Toshima; Kenji Honda; Katsuhito Akahane; Makoto Sato (Smart Graphics, 2015)