@article{TIMM_2024_30_4_a5,
     author = {V. A. Baranskii and I. A. Nasyrov and T. A. Senchonok},
     title = {$4$-graceful trees},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {64--76},
     year = {2024},
     volume = {30},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2024_30_4_a5/}
}