Perhaps I may be missing something, but in general, I think something such as "In this work" or "This text" would suffice. The thesis itself will be a form of publication, and you are writing it from that perspective, so it is perfectly acceptable to make reference to specific areas within the thesis, especially since you are likely to have results or new content that may not be found in other publications of yours.
More specifically, what exactly about your thesis are you trying to reference? Is it a result that can be found on a specific page, in a chapter or a particular figure? If so, then I would make specific reference to where exactly the reader can find the information. Maybe when describing results collectively, you could say "the results presented in this chapter" so that it's more clear to what you are trying to refer.
Are you citing some exposited logic or text that was previously introduced or will be further explained later on? Then the common ways of referring to this would be "see above/below", "in the previous/next section", "in the section entitled X", or the Latin equivalents vid supra (v.s.) and vid infra (v.i.).