@article{AHL_2021__4__1035_0,
     author = {Nakamura, Shu and Taira, Kouichi},
     title = {Essential self-adjointness of real principal type operators},
     journal = {Annales Henri Lebesgue},
     pages = {1035--1059},
     publisher = {\'ENS Rennes},
     volume = {4},
     year = {2021},
     doi = {10.5802/ahl.96},
     language = {en},
     url = {https://ahl.centre-mersenne.org/articles/10.5802/ahl.96/}
}