| article html file updated | 6 February 2020 19:13 CET | Update | https://www.mdpi.com/2227-7390/3/2/428 |
| article html file updated | 20 September 2019 22:09 CEST | Update | - |
| article html file updated | 6 May 2019 18:44 CEST | Update | - |
| article html file updated | 26 March 2019 03:52 CET | Update | - |
| article html file updated | 21 August 2015 12:54 CEST | Update | - |
| article html file updated | 8 July 2015 10:59 CEST | Original file | - |
| article xml file uploaded | 8 July 2015 10:59 CEST | Original file | https://www.mdpi.com/2227-7390/3/2/428/xml |
| article pdf uploaded. | 1 June 2015 09:00 CEST | Version of Record | https://www.mdpi.com/2227-7390/3/2/428/pdf |
