@article{10_2298_FIL2211561K,
     author = {Yoenha Kim and Eungil Ko},
     title = {On hyponormality of the sum of two composition operators},
     journal = {Filomat},
     pages = {3561 },
     year = {2022},
     volume = {36},
     number = {11},
     doi = {10.2298/FIL2211561K},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2211561K/}
}