This is the 7124th most frequent Portuguese word.
kislanov
"Kislanov" is not a Portuguese word. It may be a name or term from another language.
In this sentence, 'Kislanov' functions as a proper noun, being used as a name for an author.
O nome do autor do livro é Kislanov.
The name of the book's author is Kislanov.
Here, 'Kislanov' is again used as a proper noun, referring to a specific individual whose works are being discussed.
Você já leu alguma obra escrita por Kislanov?
Have you read any work written by Kislanov?
In this context, 'Kislanov' is mentioned as a figure whose conceptual contributions are acknowledged within a theoretical framework.