| article html file updated | 8 February 2020 07:21 CET | Update | https://www.mdpi.com/1999-5903/9/2/20 |
| article html file updated | 25 September 2019 03:37 CEST | Update | - |
| article html file updated | 3 May 2019 19:12 CEST | Update | - |
| article html file updated | 30 June 2017 22:33 CEST | Update | - |
| article html file updated | 30 June 2017 10:22 CEST | Update | - |
| article xml uploaded. | 30 June 2017 10:21 CEST | Update | https://www.mdpi.com/1999-5903/9/2/20/xml |
| article pdf uploaded. | 30 June 2017 10:21 CEST | Updated version of record | https://www.mdpi.com/1999-5903/9/2/20/pdf |
| article html file updated | 9 June 2017 04:21 CEST | Original file | - |
| article pdf uploaded. | 9 June 2017 04:20 CEST | Updated version of record | https://www.mdpi.com/1999-5903/9/2/20/pdf-vor |
| article pdf uploaded. | 2 June 2017 16:02 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/2/20/pdf-vor |
