| article html file updated | 8 February 2020 19:36 CET | Update | https://www.mdpi.com/1999-5903/9/4/71 |
| article html file updated | 28 September 2019 01:17 CEST | Update | N/A |
| article html file updated | 2 May 2019 18:37 CEST | Update | N/A |
| article html file updated | 2 January 2018 11:17 CET | Update | N/A |
| article pdf uploaded. | 2 November 2017 02:06 CET | Updated version of record | https://www.mdpi.com/1999-5903/9/4/71/pdf |
| article html file updated | 28 October 2017 11:51 CEST | Original file | N/A |
| article xml uploaded. | 28 October 2017 11:50 CEST | Original file | https://www.mdpi.com/1999-5903/9/4/71/xml |
| article pdf uploaded. | 28 October 2017 11:50 CEST | Updated version of record | https://www.mdpi.com/1999-5903/9/4/71/pdf-vor |
| article pdf uploaded. | 27 October 2017 11:25 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/4/71/pdf-vor |
