1. A.V. Ivanov, et al., The electron gun with variable beam profile for optimization of electron cooling, EPAC2002, Paris, France, pp. 1356–1358, http://accelconf.web.cern.ch/AccelConf/e02/PAPERS/WEPRI049.pdf.
2. A.V. Bubley, V.V. Parkhomchuk, V.B. Reva, Advantages of electron cooling with radial varying the electron beam density, Nucl. Instr. and Meth. A, (2004) these Proceedings.
3. A.V. Ivanov, M. Tiunov, UltraSAM-2D code for simulation of electron guns with ultra high precision, EPAC2002, Paris, France, pp. 1634–1636, http://accelconf.web.cern.ch/AccelConf/e02/PAPERS/WEPRI050.pdf.