Article History
Received: 12 October 2018
Accepted: 1 March 2019
First Online: 2 May 2019
Change Date: 13 December 2019
Change Type: Correction
Change Details: The article Semi-supervised Ladder Networks for Speech Emotion Recognition written by Jian-Hua Tao, Jian Huang, Ya Li, Zheng Lian and Ming-Yue Niu, was originally published on vol. 16, no. 4 of <Emphasis Type="Italic">International Journal of Automation and Computing</Emphasis> without Open Access. After publication, the authors decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2019 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.