The phrase "as shown by several" is correct and usable in written English.
It can be used when referencing evidence or examples provided by multiple sources or instances.
Example: "The effectiveness of the new policy is evident, as shown by several studies conducted over the past year."
Alternatives: "as demonstrated by various" or "as indicated by multiple".
Therefore, as shown by several studies, shareholder activists increase the value of the firm –at least, in the short-term.
This limitation is not imposed by the medium, as shown by several satisfying series and the occasional mold-breaking network movie.
What is of greater concern is that few over all — and even fewer minorities — are ever asked to participate, as shown by several studies.
As shown by several examples from arid and semi-arid regions, lives have been altered by rapid changes in landscapes, but separating human causes that may be manageable from non-human drivers that may not is commonly difficult.
On the other hand it's clear that where he wants to go -- as shown by several recorded pieces over the last five years -- is writing for a large acoustic orchestra and attaining a greater range of expression and nuance, rather than dealing in sheer power.
The natural N- and C-termini, i.e., the given order of secondary structure segments, are critical for protein folding and stability, as shown by several studies using circularly permuted proteins, mutants that have their N- and C-termini linked and are then digested at another site to create new termini.
The timing of the screening test will have an important influence on the results obtained, as MRSA colonisation is often transient - as has been shown by several prospective cohort studies [ 7, 33, 59].
For many potential REDD applications, remote sensing technologies for REDD are often no longer technically constrained, as has been shown by several studies for many regions [3 5].
More accurate predictions of the composition of the precipitating solid-solution requires this latter consideration (with the knowledge of a number of experimental parameters) as has been shown by several authors [11, 61, 62].
However, VEGFRs may also be present on tumor cells, as has been shown by several studies listed by Hicklin and Ellis [ 21].
In contrast, patients with a limited number of colorectal liver metastases may benefit from surgical resection, as has been shown by several studies[ 12, 13 ].
