Optim Lett (2013) 7:1045 DOI 10.1007/s11590-012-0492-6 LETTER TO THE EDITOR

Letter to the Editor Adam Janiak · Mikhail Y. Kovalyov

Received: 23 February 2012 / Accepted: 27 April 2012 / Published online: 7 June 2012 © The Author(s) 2012. This article is published with open access at Springerlink.com

We would like to inform you that the mistake in JORS paper [1] mentioned in Rudek [2] had been corrected in our JORS paper [3] with the acknowledgments to Rudek. The material of [2] was originally submitted to JORS, where it was rejected because of our correction [3]. R. Rudek was informed about this fact before he submitted [2], which is confirmed by the relevant correspondence. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

References 1. Bachman, A., Janiak, A.: Scheduling jobs with position-dependent processing times. J. Oper. Res. Soc. 55, 257–264 (2004) 2. Rudek, R.: A note on proving the strong NP-hardness of a scheduling problem with position dependent job processing times. Optim. Lett. (2012). doi:10.1007/s11590-012-0445-0 3. Janiak, A., Kovalyov, M.Y.: Corrigendum to Bachman A, Janiak A (2004) Scheduling jobs with positiondependent processing times. J. Oper. Res. Soc. 63, 1018–1020 (2012)

A. Janiak (B) Wrocław University of Technology, Wrocław, Poland e-mail: [email protected] M. Y. Kovalyov United Institute of Informatics Problems, National Academy of Sciences of Belarus, Minsk, Belarus

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