https://www.libfox.ru/611992-5-dmitriy-tkachenko-rabota-s-vozrazheniyami-200-priemov-prodazh-dlya-holodnyh-zvonkov-i-lichnyh-vstrech.html#book
https://www.youtube.com/watch?time_continue=2&v=_Ly-Ujvs3iA