| article html file updated | 6 February 2020 03:45 CET | Update | https://www.mdpi.com/2073-4336/4/3/426 |
| article html file updated | 8 May 2019 01:49 CEST | Update | N/A |
| article html file updated | 21 March 2019 02:51 CET | Update | N/A |
| article html file updated | 21 July 2017 04:12 CEST | Update | N/A |
| article html file updated | 21 July 2017 04:11 CEST | Update | N/A |
| article html file updated | 21 July 2017 04:11 CEST | Original file | N/A |
| article xml uploaded. | 21 July 2017 04:10 CEST | Original file | https://www.mdpi.com/2073-4336/4/3/426/xml |
| article pdf uploaded. | 13 August 2013 11:43 CEST | Version of Record | https://www.mdpi.com/2073-4336/4/3/426/pdf |
