1. The article discusses the early research on tunnel diodes by Prof. V. L. Bonch-Bruyevich in the Soviet Union. 2. Bonch-Bruyevich focused on the effects of alloying conditions on tunnel diode characteristics, emphasizing the importance of real crystals rather than ideal ones. 3. He introduced the concept of 'dislocation bands' and their potential impact on the volt-ampere characteristics of tunnel diodes.