1. Butler KC, Maher TR, Thomas DC, Borovetz HS, Antaki JF, Litwak P. Design and development of miniature axial flow blood pumps. American Society of Mechanical Engineers, Advances in Bioengineering 1994;BED-Vol 28, pp. 29–30.
2. Butler KC, Wampler RK, Maher TR, et al. Demonstration and evaluation of an implantable axial flow blood pump [Abstract]. Proceedings Cardiovascular Science and Technology Conference (AAMI), 1991; 183.
3. Butler KC, Maher TR, Kormos RL, Griffith BP, Borovetz HS, Antaki JF. Development of an implanted axial flow LVAS. Proceedings Cardiovascular Science and Technology Conference (AAMI), 1992; 173.
4. NIH/SBIR 2R44-HL 42701-02, Chronic VAS Utilizing Axial Flow Blood Pump—Phase II (1992–94);
5. NIH/SBIR 1R43 HL 54295-01, Axial Flow Blood Pump with Simplified Bearings (1994–95);