@article{UZERU_1986_1_a4,
     author = {G. T. Apoyan},
     title = {Parameter estimation of undifferentiable trend coefficient},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {33--42},
     publisher = {mathdoc},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1986_1_a4/}
}