user254: Sometimes someone may flag the fact that @frankk includes references to lucid24.org -- for example in this answer.
I believe it's generally permitted for an author to reference their own work published on another site, if:

It's on-topic to the OP's question
They disclose that it's their own work
Their answer on this site isn't only a hyperlink

For further details, see How to not be a spammer -- which says, among other things,:

However, you must disclose your affiliation in your answers.

I believe that frankk has done this: the user profile says ...

http://lucid24.org/ Contains my pali + english translations of suttas, and notes on EBT (early buddhist texts).
http://notesonthedhamma.blogspot.com/ my analysis and commmentary on EBT sutta passages

... and this answer says ...

I've done a thorough study of the 16 steps here:

... so it's certainly "disclosing affiliation".
Therefore I suppose that the references in @frankk's answers generally comply with these guidelines and don't automatically need flagging.
If you disagree, and think that the reference shouldn't be included in a given answer, then please explain why?

user43: An answer can't Just link to an external site, it must make an actual attempt to answer the question on SE, even if in short form. 

254: <p>Sometimes someone may flag the fact that <a href="https://buddhism.stackexchange.com/users/16297/frankk?tab=profile">@frankk</a> includes references to lucid24.org -- for example in <a href="https://buddhism.stackexchange.com/a/38884/254">this answer</a>.</p>
<p>I believe it's generally permitted for an author to reference their own work published on another site, if:</p>
<ul>
<li>It's on-topic to the OP's question</li>
<li>They disclose that it's their own work</li>
<li>Their answer on this site isn't only a hyperlink</li>
</ul>
<p>For further details, see <a href="https://buddhism.stackexchange.com/help/promotion">How to not be a spammer</a> -- which says, among other things,:</p>
<blockquote>
<p>However, you <em>must</em> disclose your affiliation in your answers.</p>
</blockquote>
<p>I believe that frankk has done this: the user profile says ...</p>
<blockquote>
<p><a href="http://lucid24.org/" rel="nofollow noreferrer">http://lucid24.org/</a> Contains my pali + english translations of suttas, and notes on EBT (early buddhist texts).</p>
<p><a href="http://notesonthedhamma.blogspot.com/" rel="nofollow noreferrer">http://notesonthedhamma.blogspot.com/</a> my analysis and commmentary on EBT sutta passages</p>
</blockquote>
<p>... and this answer says ...</p>
<blockquote>
<p>I've done a thorough study of the 16 steps here:</p>
</blockquote>
<p>... so it's certainly &quot;disclosing affiliation&quot;.</p>
<p>Therefore I suppose that the references in @frankk's answers generally comply with these guidelines and don't automatically need flagging.</p>
<p>If you disagree, and think that the reference shouldn't be included in a given answer, then please explain why?</p>
 43: <p>An answer can't <em>Just</em> link to an external site, it must make an actual attempt to answer the question on SE, even if in short form. </p>
