参考文献

Gurvich; Yakov Abramovich; Grinberg; Alexandr Afroimovich; Liakumovich; Alexandr Grigorievich; Michurov; Jury Ivanovich; Starikova; Olga Fedorovna; Yanshevsky; Vladimir Avgustovich; Kumok; Simona Tevievna; Styskin; Evgeny Lvovich; Rutman; Grigory Iosifich Patent: US4087469 A1, 1978 ;