| article html file updated | 7 February 2020 02:06 CET | Update | https://www.mdpi.com/2218-1989/5/4/720 |
| article html file updated | 6 May 2019 05:14 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:16 CET | Update | N/A |
| article html file updated | 28 December 2015 09:52 CET | Original file | N/A |
| article xml file uploaded | 28 December 2015 09:52 CET | Update | https://www.mdpi.com/2218-1989/5/4/720/xml |
| article pdf uploaded. | 11 December 2015 14:26 CET | Version of Record | https://www.mdpi.com/2218-1989/5/4/720/pdf |
| article xml uploaded. | 11 December 2015 14:26 CET | Original file | N/A |
