May be non-copyrighted documment included in main?

[Petr Gajdusek <gajdusek.petr@centrum.cz>]

The only notice in the documment says:

"This publication is not copyrighted. One can copy it and use any part
of it with mentioning the source. Publishers ask only for information
about it."

Is this sufficient to include publication in main section?

Thank you for answer.

Petr Gajdusek