1)
Burago, Yu. D.;
Ivanov, S. V.;
Malev, S. G.
Remarks on Chebyshev coordinates. (Russian. English, Russian summary)
Zap. Nauchn. Sem. S.-Peterburg. Otdel. Mat. Inst. Steklov. (POMI) 329 (2005), Geom. i Topol. 9, 5--13, 195.
2)
Burago, Yu. D.;
Malev, S. G.;
Novikov D.I.
A direct proof of one Gromov's theorem. (English)
Zap. Nauchn. Sem. S.-Peterburg. Otdel. Mat. Inst. Steklov. (POMI) 353 (2008), Geom. i Topol. 10, 14--26;
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