1. O. B. Lupanov, O ventilnykh i kontaktno-ventilnykh skhemakh,Dokl. Akad. Nauk SSSR, 111, 1171–1174, (1956).
2. E. I. Nechiporuk, O ventilnykh skhemakh,Dokl. Akad. Nauk SSSR, 148, 50–53, (1963), translated into english as: Rectifier networks,Sov. Phys. Dokl., 8 5–7 (1963).
3. E. I. Nechiporuk, Ob odnoi bulevskoi matritse,Prob. Kib., 21, 237–240, (1969), translated into English as: On a Boolean matrix,Sys. Theory Res., 21, 236–239, (1971).
4. V. A. Orlov, Realizatsiya “uzkikh” matrits ventilnymi skhemami,Prob. Kib., 22, 45–52, (1970), translated into English as: Realization of “narrow” matrices by means of gate networks,Sys. Theory Res., 22, 42–50, (1972).
5. N. Pippenger, On the evaluation of powers and related problems,Proc. 17 th Ann. IEEE Symp. on Found of Computer Sci., Houston, TX, 258–263, 25–27 Oct. 1976.