| article html file updated | 6 February 2020 07:51 CET | Update | https://www.mdpi.com/2227-7102/4/1/139 |
| article html file updated | 7 May 2019 17:25 CEST | Update | - |
| article html file updated | 21 March 2019 13:46 CET | Update | - |
| article html file updated | 19 August 2015 23:28 CEST | Update | - |
| article html file updated | 14 August 2014 11:41 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:41 CEST | Update | https://www.mdpi.com/2227-7102/4/1/139/xml |
| article html file updated | 14 August 2014 11:21 CEST | Original file | - |
| article xml file uploaded | 14 August 2014 11:21 CEST | Original file | - |
| article pdf uploaded. | 12 March 2014 10:25 CET | Updated version of record | https://www.mdpi.com/2227-7102/4/1/139/pdf |
