The phrase "asserts further" is correct and usable in written English.
It can be used when you want to indicate that someone is making an additional claim or statement that builds upon a previous assertion.
Example: "The researcher asserts further that the findings support the hypothesis."
Alternatives: "further claims" or "adds additionally".
Because office parks already have roads and utilities, the study asserts, further development of those properties would not be as costly for developers.
A Los Angeles Unified School District legal opinion asserts further that portable computers that can be taken home are a logical, updated extension of technology, which used to be available to students only in computer labs with bolted-down desktop devices.
Tensions regularly flare over the site, with Palestinians fearing Israel will seek to assert further control over it.
HERR BOHM: And the Prosecution assert further that the SA sent 70percentt of its millions of members straight to the Wehrmacht.
The defense will assert, further, that there was additional tampering with evidence, beyond the placing of the second glove at Simpson's house.
The incident, he asserted, further indicts his former employer, which he and others have long argued should not be in charge of supervising nonprofits.
MOSCOW — Asserting further personal control over the Russian economy, President Vladimir V. Putin nominated on Tuesday a close political ally, who is now serving as his chief economic adviser, to become the new chief of the Russian central bank.
The French moved to stop Siam from asserting further claims over Cambodia and forced Siam to return the royal regalia, and Norodom was finally crowned at Oudong, Cambodia, in June 1864, with both French and Siamese officials attending.
To assert further that Ethiopia is not a humanitarian disaster, but "an evolutionary and demographic disaster" (attributable primarily to too many people trying to live on arid, drought-prone land in the Great Rift Valley) marks you down automatically as a heartless fascist.
"Even if it's not a fifty-fifty split, we should be allowed at least a third, or something reasonable like that". The defense will assert, further, that there was additional tampering with evidence, beyond the placing of the second glove at Simpson's house.
DealBook » Putin Names Loyalist to Lead Russian Central Bank | The New York Times reports: "Asserting further personal control over the Russian economy, President Vladimir V. Putin nominated on Tuesday a close political ally, who is now serving as his chief economic adviser, to become the new chief of the Russian central bank".
