Mehler A. Aspects of automatic text analysis / A. Mehler, R. Kohler, 2006 r=on-line. - Текст : электронный.
Kohler R. Erkennung von Fehlern in Drehstromtransformatoren mittels Differentialschutz-Algorithmen : Diss. / R.K@:ohler, 1998. - 114 S. - Текст : непосредственный.
X-ray topography and high-resolution diffraction : 2nd European symposium on X-ray topography and high-resolution diffraction,held 0n 5-7 Sept.1994,Berlin / Ed.: R. Kohler, H. Klapper, 1995. - 300 p. - Текст : непосредственный.