Is there a function for getting the CONTENT author profile link?

I see on the theme function reference, there is a function GetCommentAuthorProfileLink.  That's great for comments, but I would like to link to the profile of the author of an article, too.  There is no GetContentAuthorProfileLink that I can find — is there a way to do this?  Using "GetCommentAuthorProfileLink" is not working, but I cannot guarantee that my PHP code is correct.

This code:

Posted by
<?php
  $strCommentAuthorProfileLink = $CMS->TH->GetCommentAuthorProfileLink();
  if ($strCommentAuthorProfileLink) {
?>
<a href="<?php print($strCommentAuthorProfileLink); ?>"><?php $CMS->TH->GetContentAuthorName() ?></a>
<?php
  } else
    $CMS->TH->GetContentAuthorName()
?>

returns this:

Posted by
Notice: Undefined offset: -1 in [snip]/sys/includes/html/Theme.php on line 661

... which I assume is because I'm trying to call a comment author profile in the wrong section? 

(Also, I didn't define a variable $strContentAuthorName even though I'm repeating things because I don't want to mess with figuring out how to do user-defined variables until I get this part right.)