The phrase "authoritative materials" is correct and usable in written English.
It can be used when referring to sources or documents that are considered reliable and credible in a particular field or subject matter.
Example: "For accurate information on the topic, please refer to the authoritative materials provided by the research department."
Alternatives: "reliable sources" or "credible documents".
The guidelines, though, warn him to use "authoritative" materials only.
Therefore the published articles serve as authoritative materials for graduate students and young researchers less familiar with the fields covered.
For instance, the contention that lack of good communications with area physicians and hospitals resulted in the deaths of postal workers in the fall 2001 anthrax crisis is not supported by the author's reference or by any other authoritative materials known to this reviewer.
Use Wikipedia only as a personal guide or overview of a topic, and as a source of authoritative materials cited within an article on the site.
Polin, established in 1986 by the Institute for Polish-Jewish Studies, has acquired a well-deserved reputation for publishing authoritative material on all aspects of Polish Jewry.
The Association of Graduates of the United States Military Academy began publishing annual reports in 1870 and have thus added a wealth of authoritative statistical material to that which would otherwise have been meagre.
Strategies used to optimize your position as an expert celebrity include highlighting local (or regional) press, writing books and other authoritative and informative materials, and distributing your writing so that it becomes widely available.
A registration is a time-stamped read-only copy of an OSF project that can be used to preregister a research design, to create registered reports for journals, or at the conclusion of a project to formally record the authoritative copy of materials.
For decades, the two enterprises were singularly authoritative, providing research material for journalists, entertainment professionals and fans.
Newly available rabbinic materials became authoritative guides to the institutions and practices of the perfect republic.
Authoritative but concise reference materials preferred as a means to inform planning and be readily available during a crisis, supplemented by additional information from science providers as needed.
