Изключително обширно е изследователското поле на Валери Стоянов. Хронологично - от палеоисторията буквално до наши дни, а проблематично обхваща история и историография (пред-антична, антична, средновековна, модерна и съвременна), изворознание и свързаните с него палеография, дипломатика, ономастика. ... Според мен д.и.н. Валери Стоянов е единственият действителен последовател на съвременния неопозитивизъм в българската историография.
Проф. д.и.н. Цветана Георгиева
One of my most talented aspirants from abroad was Valeriy Stojanov (1951-) who wrote an excellent dissertation on the history of Ottoman paleography and documents. This work was immediateley published by my friend, Klaus Schwarz, in his series Islamkundliche Untersuchungen. Today, Valeriy is a fellow at the Institute of History of the Bulgarian Academy of Sciences, and was its Deputy Director for many years. As a result of his hard work, he has published large volumes, which I have been honored to receive from him.
Prof. Dr. Dr.h.c. George Hazai
György Hazai. Against Headwinds on the Lee Side. Memoirs of a Passionate Orientalist. Walter de Gruyter GmbH Berlin/Boston, 2019, p. 309.