The phrase "a paper asserting that" is correct and usable in written English.
You can use it when discussing the content or claims made in an academic or research paper.
Example: "The paper asserting that climate change is primarily driven by human activity has sparked significant debate among scientists."
Alternatives: "a study claiming that" or "a report stating that".
The British government published a "white paper" asserting that Saddam Hussein and his unconventional arms posed an immediate danger.
In 2005, L. Patrick Devlin, a professor emeritus of communication studies at the University of Rhode Island, delivered a conference paper asserting that the Bush campaign and Progress for America might have unlawfully coördinated their advertising plan.
WASHINGTON, June 22 — A controversial paper asserting that recent warming in the Northern Hemisphere was probably unrivaled for 1,000 years was endorsed today, with a few reservations, by a panel convened by the nation's pre-eminent scientific body.
Two days later, Jacinta De Roeck, one of three senators who sponsored the euthanasia law and the director of Belgium's Liberal-Humanist Association, published an op-ed in the paper, asserting that there had been no abuses of the law since it was passed, ten years earlier.
A large photograph of Matteo Darmian dominates the front page of Italy's TuttoSport, with the paper asserting that Juventus have the Manchester United full-back "in their grasp".
Both Gingerich and Hurum expressed their doubts about the evolutionary placement of Darwinius in the Afradapis paper, asserting that the traits that linked the primate to anthropoids were either left out or misinterpreted (Barras 2009; Bower 2009).
In 1972 an academic paper asserted that there was more genetic difference within so-called races than there was between them.
The paper asserts that a satisfaction rating can be obtained for completed automation projects based on this tautology.
The cosmetics industry claims the levels of mercury found in cosmetics pose little risk to human health, but an August 2005 WHO policy paper asserts that "studies suggest that mercury may have no threshold below which some adverse health effects do not occur".
