<p>Reference request are (often) on-topic, but try to make it as concrete and specific as possible, maybe with an (applied?) example? Maybe you could include a (simulated?) data example.</p>
<p>Have a look through <a href="https://stats.stackexchange.com/search?q=%5Breferences%5D+resear*+closed%3Ano+-book+-textbook">this list of posts</a> and the specific example <a href="https://stats.stackexchange.com/questions/95376/what-is-the-current-research-on-missing-not-at-random-data">What is the current research on missing not at random data?</a></p>
<p>There is good advice about asking questions in <a href="https://stats.meta.stackexchange.com/questions/1479/how-to-ask-a-good-question-on-crossvalidated">How to ask a &quot;good&quot; question on CrossValidated?</a></p>
