On the 10th of July, the birthday of Nikola Tesla, the book "Nikola Tesla – Human Angel" by engineer Spasoje Vlajic was presented in the marble hall of the Central House of Journalists in Moscow. The presentation was introduced by Milka Kresoja, the founder of the Center for Research into Nikola Tesla Heritage. The audience then listened to the remarks by Natalia Aleksandrovna, editor-in-chief of magazine "Delvfis." The author himself briefly spoke about his book underlining that it was about the "mental technique which builds internal mental tools with the aim to fulfill all identified goals. Mental technology develops inner faith and self-confidence to carry out external plans by total mental focus on the inside world that dictates and controls the outside one". It is about what you can do for yourself, how to improve your daily life, inspire constant joy, optimism and faith in yourself.

A book was discussed by Pravdicev Vitaliy Leonovich, candidate of technical sciences, auteur director of a film about Nikola Tesla, Suhonos Sergei Ivanovich, candidate of technical sciences, Vladimir Bychkov Ljvovich, doctor of physico-mathematical sciences, RAEN academician, head of the laboratory MRTI of the Russian Academy of Sciences, President of the Russian International Committee for the Study of ball lightning and Dmitry Somjenovich, professor, doctor, academician of technical sciences.

Spasoje Vlajic is the author of several books and scientific papers. He explores the psychological connection between mechanical energy of voices with electromagnetic energy of nerve impulses and brain waves.