| article html file updated | 7 February 2020 06:23 CET | Update | https://www.mdpi.com/2220-9964/5/4/44 |
| article html file updated | 5 May 2019 20:28 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:18 CET | Update | N/A |
| article html file updated | 27 April 2016 10:19 CEST | Update | N/A |
| article html file updated | 25 March 2016 10:29 CET | Original file | N/A |
| article xml uploaded. | 25 March 2016 10:28 CET | Original file | https://www.mdpi.com/2220-9964/5/4/44/xml |
| article pdf uploaded. | 25 March 2016 10:28 CET | Version of Record | https://www.mdpi.com/2220-9964/5/4/44/pdf |
