| article html file updated | 7 February 2020 17:09 CET | Update | https://www.mdpi.com/2073-4395/6/4/52 |
| article html file updated | 22 September 2019 04:11 CEST | Update | N/A |
| article html file updated | 5 May 2019 00:08 CEST | Update | N/A |
| article html file updated | 29 December 2016 04:32 CET | Update | N/A |
| article html file updated | 28 October 2016 10:48 CEST | Original file | N/A |
| article xml uploaded. | 28 October 2016 10:47 CEST | Original file | https://www.mdpi.com/2073-4395/6/4/52/xml |
| article pdf uploaded. | 28 October 2016 10:47 CEST | Version of Record | https://www.mdpi.com/2073-4395/6/4/52/pdf |
