The phrase "asserted among" is correct and usable in written English.
It can be used when indicating that something has been stated or declared within a group or among individuals.
Example: "The findings were asserted among the researchers during the conference."
Alternatives: "claimed within" or "declared among".
The book asserted, among other things, that she had hired private detectives to track Maureen Orth, who was writing a piece about her for Vanity Fair.
Iran's president, Mahmoud Ahmadinejad, had just finished speaking in the campus center, where he asserted, among other things, that Iran had no homosexuals.
Every subculture has its particular ethos, and it is generally asserted among dog owners that a female in heat should be isolated from other dogs.
Microsoft has asserted, among other things, that the integration of its operating system and applications software divisions into one company produces efficiencies that bring innovation.
"In his appeal of the original decision, Professor Chapela asserted, among other things, that the tenure review process had been improperly influenced by conflict of interest and/or bias on the part of one or more of the faculty committee reviewing the case," read a statement released by the university on Friday.
The article, the title of which was taken from a song by American musician Bob Dylan, asserted, among other things, that black liberation was key to the movement's anti-imperialist struggle, and it emphasized the need for a white revolutionary movement to support liberation movements internationally.
Postings assert, among other things, that the Constitution limits Congress to taxing only incomes that are derived from foreign commerce.
Comcast has been pushing back, asserting, among other things, that such a move by the F.C.C. would infringe on its First Amendment rights.
The Kirbys fired back in the Central District of California, asserting, among other things, the right to reclaim copyrights to many of those characters.
Ms. Drew's defense asserts among other things, as it did at trial, that she never read MySpace's terms of service in detail.
Obama's opponents counter that he does not live up to his own message, asserting, among other things, that his plan to overhaul trade policy is pandering.
