| article html file updated | 6 February 2020 19:26 CET | Update | https://www.mdpi.com/2227-7390/3/2/444 |
| article html file updated | 6 May 2019 18:18 CEST | Update | - |
| article html file updated | 26 March 2019 04:17 CET | Update | - |
| article html file updated | 21 August 2015 13:15 CEST | Update | - |
| article html file updated | 24 July 2015 08:40 CEST | Original file | - |
| article xml file uploaded | 24 July 2015 08:40 CEST | Original file | https://www.mdpi.com/2227-7390/3/2/444/xml |
| article pdf uploaded. | 5 June 2015 15:20 CEST | Version of Record | https://www.mdpi.com/2227-7390/3/2/444/pdf |
