The phrase "an additional proof" is correct and usable in written English.
It can be used when referring to an extra piece of evidence or argument that supports a claim or theory.
Example: "In addition to the previous findings, I would like to present an additional proof that reinforces our hypothesis."
Alternatives: "an extra piece of evidence" or "a further demonstration".
This study provides an additional proof to endorse a previous proposal that PLMVd pathogenicity determinants reside in L11.
As an additional proof, the PL was quenched while crystalline Si-np could be formed by laser annealing.
As an additional proof, the PL quenched while Si crystalline Si-np could be formed by an intense laser irradiation.
Thus, our research is an additional proof of concept of the Co-Training algorithm in employing unlabeled data.
Thus, IR spectrum gives us an additional proof for the formation of core-shell nanostructures with functionalized shells.
This paper extends our previous work presented in [8], with a more detailed system description, an additional proof of concept implementation, more extensive overhead evaluation, and further comparison with existing systems.
Even as a novice, I don't feel like I need any additional proof -- be it brain scans or anything else -- to show me that something is going on.
What a great additional proof point to bring this home.
In the 19 infants hospitalized for suspected B. pertussis we studied, when clinical features suggested whooping cough as a diagnosis, additional proof might come from laboratory findings showing marked lymphocytosis [ 12, 15, 28, 29].
"The results provide additional proof that a simple drug like aspirin can help prevent colon cancer," said Dr. Andrew T. Chan, the study's lead author and an assistant professor of medicine at Harvard.
We also measured the underpotential deposition (UPD) of copper (Cu) on a Au NW electrode as additional proof of its crystallinity.
