The reference materials of this period can probably be divided into several aspects.
First, in the 24-year history,
History of the Three Kingdoms (referring to the early Western Jin Dynasty), Book of Jin, Book of Song Dynasty, Book of Southern Qi, Liang Shu, Book of Chen, Book of Wei, Book of Northern Qi, Book of Zhou, History of South, History of North and Sui Shu (referring to the history of the late Northern and Southern Dynasties).
In addition, Paulus Johannes's masterpiece "Purple Tongzhi Sword" is also highly recommended by himself. The advantage of this book is that it is written according to the calendar year, rather than the traditional biographical style of 24 histories. The shortcoming of Sima Guang's masterpiece is that he only pays attention to politics and military affairs, and ignores everything else. If you only study political events, you can use "Tongzhijian" as your index book to determine your research direction and focus-and then read the twenty-four histories just recommended to find more detailed information.
As for modern works, I can also recommend some to you.
Chen-lectures on the history of Wei, Jin, Southern and Northern Dynasties
Historical manuscripts of Wei, Jin, Southern and Northern Dynasties
History of Wei, Jin, Southern and Northern Dynasties-China Library History, Tang Dynasty.
The Collection of History of Wei, Jin, Southern and Northern Dynasties was published in Peking University.
These are basically enough for you. I hope they will help you.
You can ask me any questions about history, mathematics, physics and astronomy in the future. Thank you.