The first port of call in this study is to identify the origins of 1 Thessalonians with a focus on the integrity of the text, authorship, and date, followed by an extended discussion of genre, style, and structure. Thereafter, I will discuss some of the possible sources behind 1 Thessalonians.
Gupta, Nijay, "Text of 1 Thessalonians (Chapter in 1 & 2 Thessalonians: Zondervan Critical Introductions to the New Testament)" (2019). Faculty Publications - Portland Seminary. 147.