The Ming loyalist rump courts south of the Yangtze after Beijing fell in 1644 — a series of princes (Hongguang, Longwu, Yongli) resisting the Qing conquest for eighteen years.
The last emperor, Yongli, was captured in Burma and executed by Wu Sangui in 1662; loyalist resistance continued only offshore under the Zheng family on Taiwan (Tungning).
The standard English-language history of the Southern Ming courts.
Broad imperial-China survey with full treatment of the Ming-Qing transition.