Low Voltage Thermo-mechanically Driven Monolithic Microgripper with Piezoresistive Feedback. - Vladimir Stavrov; Emil Tomerov; Chavdar Hardalov; Daniel Danchev; Kostadin Kostadinov; Galina Stavreva; Evstati Apostolov; Assen Shulev; Anna Andonova; Mohammed Al-Wahab (IPAS, 2010)

Development of a Piezo-actuated Robot for Cell Injection. - Dimitar Chakarov; Kostadin Kostadinov; Assen Shulev; Tihomir Tiankov (ICINCO (2), 2012)

A Robot for Cell Injection: Modeling, Design and Experimental Validation. - Kostadin Kostadinov; Dimitar Chakarov; Assen Shulev; Tihomir Tiankov (Int. J. Intell. Mechatronics Robotics, 2013)

A sliding-window transform-domain technique for denoising of DSPI phase maps. - Assen Shulev; Atanas P. Gotchev (Image Processing: Algorithms and Systems, 2014)