@inproceedings{Poluianov:2023n+, author = "Poluianov, Stepan and Batalla, Oscar and Mishev, Alexander and Koldobskiy, Sergey and Usoskin, Ilya", title = "{Two sub-GLE events detected with South Pole and Vostok neutron monitors in 1968 and 1969}", doi = "10.22323/1.444.1250", booktitle = "Proceedings of 38th International Cosmic Ray Conference {\textemdash} PoS(ICRC2023)", year = 2023, volume = "444", pages = "1250" }