@article{10_4064_sm163_2_5,
     author = {Xiaohong Cao and Maozheng Guo and Bin Meng},
     title = {Weyl type theorems for $p$-hyponormal and
 $M$-hyponormal operators},
     journal = {Studia Mathematica},
     pages = {177--188},
     publisher = {mathdoc},
     volume = {163},
     number = {2},
     year = {2004},
     doi = {10.4064/sm163-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm163-2-5/}
}