The phrase "although authoritative" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding the authority of a statement or source.
Example: "The report was well-researched and informative, although authoritative, it lacked the necessary citations to support its claims."
Alternatives: "despite being authoritative" or "even if authoritative".
Although authoritative sources vary on the dates of his pontificate, they all agree that he reigned for nine or 10 years.
It is not possible at this time to say how much additional testing will be required or how many laboratory animals would be needed, although authoritative estimates speak of more than 10 million animals.
Although authoritative works in themselves perceptual problems arise when scientific data relating earlier work on introductions is recited without the present context of interpretation that benefits from the current science of introductions and biological conservation.
Although authoritative data on how and to what extent they are used in different National Health Service trusts are unavailable, anecdotal evidence strongly suggests both that standard troponin assay use remains common and that where used high sensitivity assays are being used in the same manner as standard troponin assays, not capitalising on their greater sensitivity.
Although an authoritative judicial declaration authorizing borrowing above the debt ceiling might alleviate investors' fears, obtaining such a declaration is no easy task.
It was felt that New Labour could not afford expressions of dissent, or even a mild diversity of views, and the hostages are John Prescott - an authoritative although occasionally incoherent representative of Old Labour, Dennis Skinner, Claire Short, Bill Morris - TGWU General Secretary representing the silence of the trade unions, Tony Benn, and Ken Livingstone.
Nine states and the District require drivers to use hands-free devices, although several recent authoritative studies have concluded that use of hands-free equipment does not make drivers any less distracted than they might be if the phone were pressed to their ear.
Astronauts have a central, although not genuinely authoritative role.
Although not as authoritative as regulations, these materials provide important additional guidance on what taxpayers can expect the IRS to do.
He is the more authoritative author, although Fornatale's writing is a bit livelier.
Members of the church regard orthodox Christian churches as apostate for lacking revelation and an authoritative priesthood, although they are thought to be positive institutions in other respects.
