Oleksandr Gamayun, Nikolai Iorgov, Yu. Zhuravlev, “Effective free-fermionic form factors and the XY spin chain”, SciPost Phys., 10:3 (2021)
Suvajit Majumder, Olof Ohlsson Sax, Bogdan Stefański, Alessandro Torrielli, “Protected states in AdS3 backgrounds from integrability”, J. Phys. A: Math. Theor., 54:41 (2021), 415401