| article html file updated | 6 February 2020 16:38 CET | Update | https://www.mdpi.com/2227-7390/3/1/40 |
| article html file updated | 6 May 2019 23:45 CEST | Update | N/A |
| article html file updated | 25 March 2019 22:58 CET | Update | N/A |
| article html file updated | 21 August 2015 08:48 CEST | Update | N/A |
| article html file updated | 20 July 2015 12:39 CEST | Original file | N/A |
| article xml file uploaded | 20 July 2015 12:39 CEST | Original file | https://www.mdpi.com/2227-7390/3/1/40/xml |
| article pdf uploaded. | 13 March 2015 17:02 CET | Updated version of record | https://www.mdpi.com/2227-7390/3/1/40/pdf |
| article pdf uploaded. | 13 March 2015 15:18 CET | Version of Record | https://www.mdpi.com/2227-7390/3/1/40/pdf-vor |
