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1983
Vasilev, Vasil, Branimir Natchev, and Stanimir Valtchev. "Power Converter of DC to Sinusoidal AC Voltage for Robotic Purposes." Scientific Session VMEI?83, Section Robotics. 1983.
1980
Valtchev, Stanimir Power supply for 2 kW ? 25 kV CO2 gas laser. Ministry of Science and Technology Bulgaria ? USSR (limited access), 1980. Abstract
International project (1251?78 and 1252?78) in which the Technical University of Sofia (S.Valtchev, N.Stefanov) has sucessfully acomplished the task of constructing and implementing in production a high precision (0.01% regulation) power supply for a cirurgical laser tool (1977-1980). The construction involved a vacuum tube cascaded with MOS-FET to obtain very high quality current source necessary for the stable characteristics of the gas discharge in the laser tube.
1979
Moniz, António B. "A proposta autonómica de António Cordeiro, ou Notas acerca das alternativas da aristocracia açoriana no Sec. XVIII." Memória da Água-Viva. 4.4 (1979): 16-17.Website
1977
Moniz, António B. "Peniche: da produção de peixe à produção de ‘lixo’ radioactivo." Raiz & Utopia.2 (1977): 159-165.Website