@article{Huang Danrun_260, author = {Huang Danrun, Zhang Dianzhou}, title = {Joint Spectrum and Unbounded Operator Algebras}, publisher = {Acta Mathematica Sinica}, year = {1986}, journal = {Acta Mathematica Sinica}, volume = {2}, number = {3}, eid = {260}, pages = {260-269}, keywords = {}, doi = https://actamath.cjoe.ac.cn/Jwk_sxxb_en/EN/10.1007/BF02582028 }