The following publications are possibly variants of this publication: 
- Sensorless speed tracking of induction motor with unknown torque base on maximum power transferHou-Tsan Lee, Li-Chen Fu, Hsin-Sain Huang. amcc 2001: 166-167 [doi] 
 - Speed tracking control with maximal power transfer of induction motorHou-Tsan Lee, Li-Chen Fu, Hsin-Shen Huang. cdc 2000: 925-930 [doi] 
 - Adaptive speed/position control of induction motor with unknown load torqueHou-Tsan Lee, Li-Chen Fu, Su-Hau Hsu. amcc 2002: 4583-4588 [doi] 
 - Nonlinear adaptive speed and torque control of induction motors with unknown rotor resistanceAn-Ming Lee, Li-Chen Fu, Chin-Yu Tsai, Yu-Chao Lin. tie, 48(2):391-401, 2001.  [doi]