The phrase "as further supplemented" is correct and usable in written English.
It can be used in contexts where additional information or modifications are being added to a previous statement or document.
Example: "The terms of the agreement will be outlined in the initial section, as further supplemented by the subsequent clauses."
Alternatives: "as additionally provided" or "as further amended".
For this, LVS and trkH mutant strains were cultivated in normal chemically defined medium (CDM+) [35] or in CDM in which sodium phosphate had replaced potassium phosphate as the buffering agent (CDMx) and further supplemented with various concentrations of potassium chloride (KCl) as a source of potassium (ranging from 0 to 100 mM).
These findings are further supplemented by the surface features as seen in SEM photomicrographs.
We further supplemented CR with HES data as Cancer Registries are using the hospital in-patient episode data as a registration source since 2009 (UKACR, 2011).
But President Obama and the Democratic Congress also passed an $870 billion economic stimulus bill that further supplemented economic demand -- and further increased Federal Spending as a percent of GDP.
As recently emerged a clean slate approach of the future Internet, CCN needs to be further supplemented yet.
Where indicated, upper and/or lower wells were further supplemented with glucose, lactate or glutamine.
This, teleology is further supplemented by Kantian-style arguments which may further rebuff positivist impulses to construe philosophical investigations as superfluous.
Medium was further supplemented with: Y27632 (10 μM; Calbiochem, Feltham, UK) or Blebbistatin (50 μM; Sigma, Gillingham, UK), as indicated.
Other research methods, such as experiments and social survey, can further supplement the findings.
Dunkley's goal was his fourth of the season, further supplementing the Harriers defender's current status as the club's top scorer.
He further supplements the lecture by playing recordings that were made on the pianos actually owned by such composers as Mozart and Beethoven.
