Complex sentence: Penlite is aware that that will raise questions about the credibility and validity of his work, but Penlite's ample use of credible references will hopefully be more than enough to resolve any such doubts.
Split into simpler sentences: Penlite is aware that that this will raise questions about the credibility and validity of his work. But Penlite's very ample use of credible references will hopefully be more than enough to resolve any such doubts.