The phrase "are already documented" is correct and usable in written English.
It can be used when referring to information or details that have been recorded or noted down previously.
Example: "The procedures for the project are already documented in the manual, so please refer to it for guidance."
Alternatives: "have been recorded" or "are noted down".
In this way, a complete WB version of the E-model can be set up, and first steps are already documented by Raake et al. [49].
Since the modifying effect on epoxy curing due to metal and coordination components and its effect on network structure are already documented in literature [5, 7, 10 12, 20], the impact of the presence of copper in a cured solder mask on the adhesion behavior was investigated in this study.
If possible the progress should be recorded in specific registries in the same manner as malignant diagnoses are already documented.
Most of the gender-specific results are already documented in the CO's annual reports and some were identified through the interview process.
While government commitments are already documented in the current NACP and in the 2009 Memorandum of Cooperation with the BMGF, NACO and the development partners, including BMGF, jointly monitor these commitments, so as to help ensure that they are sustained.
It's better to focus on one or two stories that are unique than to shoot several stories that many other photojournalists are already documenting.
Much of this is already documented, but Weiss shows that in the US, Greenspan has successfully airbrushed history.
It is already documented in animal research that some man-made nanoparticles can move easily into the brain and deep into the lungs.
Such cases of overparameterisation were already documented in similar comparisons involving the kinfit package [17].
The low activity of biflavonoids present in Hypericum perforatum extracts was already documented [22] and is to be expected.
