| article html file updated | 14 August 2026 21:23 CEST | Update | https://www.mdpi.com/2076-0752/7/1/4 |
| article html file updated | 9 February 2020 03:58 CET | Update | N/A |
| article html file updated | 2 May 2019 00:19 CEST | Update | N/A |
| article html file updated | 17 April 2019 22:47 CEST | Update | N/A |
| article html file updated | 28 March 2019 17:35 CET | Update | N/A |
| article html file updated | 26 March 2018 15:52 CEST | Update | N/A |
| article html file updated | 23 January 2018 09:20 CET | Original file | N/A |
| article xml uploaded. | 23 January 2018 09:18 CET | Original file | https://www.mdpi.com/2076-0752/7/1/4/xml |
| article pdf uploaded. | 23 January 2018 09:18 CET | Version of Record | https://www.mdpi.com/2076-0752/7/1/4/pdf |
