| article html file updated | 9 February 2020 05:08 CET | Update | https://www.mdpi.com/1999-4907/9/2/72 |
| article html file updated | 30 September 2019 10:12 CEST | Update | N/A |
| article html file updated | 1 May 2019 21:51 CEST | Update | N/A |
| article html file updated | 17 April 2019 20:39 CEST | Update | N/A |
| article html file updated | 28 March 2019 20:05 CET | Update | N/A |
| article html file updated | 14 March 2018 09:27 CET | Update | N/A |
| article html file updated | 1 February 2018 08:51 CET | Original file | N/A |
| article xml uploaded. | 1 February 2018 08:37 CET | Original file | https://www.mdpi.com/1999-4907/9/2/72/xml |
| article pdf uploaded. | 1 February 2018 08:37 CET | Version of Record | https://www.mdpi.com/1999-4907/9/2/72/pdf |
