@article{SMJ2_2021_46_4_a3,
     author = {Ivanov, Nikolay},
     title = {Examples of group amalgamations with nontrivial quasi-kernels},
     journal = {Serdica Mathematical Journal},
     pages = {357--386},
     publisher = {mathdoc},
     volume = {46},
     number = {4},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2021_46_4_a3/}
}