Борис Юрьевич Коган. Приложение механики к геометрии ("Популярные лекции по математике", djvu, #41)

Look me in the eye! The ability to make high-level eye contact is a skill every man should work on, as it has been shown to create some incredible benefits for the gazer. Numerous studies have shown that people who make higher-levels of eye contact with others are perceived as being: More dominant and powerful. More warm and personable.