None of the above answers seems to have considered the fact that ultimately, the original text as it was intended to be (before/ not considering the link), needs to be preserved and respected in its style, content and format.
The performance of each of the leading web servers was compared in this careful study.:
If that was the sentence by the author and the way the author intended it to be.
The performance of each of the leading web servers was compared in a careful study located here.:
This can only happen if the person is trying to do the authoring and linking at the same time and has no clue how to go about it. Many instances can be cited and justifications given, but no reader will be mighty please to see such an ad-hoc text as "here".
Nicholas Piel recently published the results of a comparative study of web servers.
Nicholas Piel recently published the results of a comparative study of web servers.
Nicholas Piel recently published the results of a comparative study of web servers.
Nicholas Piel recently published the results of a comparative study of web servers.
Nicholas Piel recently published the results of a comparative study of web servers.:
All are acceptable and depend entirely on what the author intends to use as the relevant text, PLUS the contextual writing style.
And, hey, these are just my thoughts.