| article html file updated | 8 February 2020 20:05 CET | Update | https://www.mdpi.com/1999-5903/9/4/72 |
| article html file updated | 28 September 2019 04:13 CEST | Update | N/A |
| article html file updated | 2 May 2019 17:30 CEST | Update | N/A |
| article html file updated | 2 January 2018 11:18 CET | Update | N/A |
| article html file updated | 1 November 2017 12:11 CET | Original file | N/A |
| article xml uploaded. | 1 November 2017 12:10 CET | Update | https://www.mdpi.com/1999-5903/9/4/72/xml |
| article xml uploaded. | 1 November 2017 12:10 CET | Original file | N/A |
| article pdf uploaded. | 1 November 2017 12:10 CET | Version of Record | https://www.mdpi.com/1999-5903/9/4/72/pdf |
