@article{TVP_1976_21_2_a26,
     author = {V. A. Vatutin},
     title = {Critical multitype age-dependent branching process with immigration},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {447--454},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1976_21_2_a26/}
}