@article{SMJ2_2020_46_1_a1,
     author = {Zagorodnyuk, Sergey},
     title = {On extensions of commuting tuples of symmetric and isometric operators},
     journal = {Serdica Mathematical Journal},
     pages = {19--34},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2020_46_1_a1/}
}