- KAZUICHI IKEGAMI, OSAMU SAEKI, “Cobordism of Morse maps and its application to map germs”, Math. Proc. Camb. Phil. Soc., 147, № 1, 2009, 235
- Jean-Paul Brasselet, Handbook of Geometry and Topology of Singularities III, 2022, 303
- Rustam Sadykov, “Bordism groups of solutions to differential relations”, Algebr. Geom. Topol., 9, № 4, 2009, 2311
- Yoshifumi Ando, “Cobordisms of maps with singularities of given class”, Algebr. Geom. Topol., 8, № 4, 2008, 1989