A. S. Val'kov, “Fast algorithms for synthesizing plane representations of finite metric configurations”, Zh. Vychisl. Mat. Mat. Fiz., 45:2 (2005), 357–368; Comput. Math. Math. Phys., 45:2 (2005), 341–351
2.
A. S. Val'kov, “On a fast algorithm for the reconstruction of the hierarchical $\varepsilon$-cluster structure”, Zh. Vychisl. Mat. Mat. Fiz., 45:1 (2005), 170–179; Comput. Math. Math. Phys., 45:1 (2005), 163–171