| article html file updated | 7 February 2020 09:35 CET | Update | https://www.mdpi.com/2227-7390/4/2/36 |
| article html file updated | 5 May 2019 14:02 CEST | Update | - |
| article html file updated | 27 March 2019 06:21 CET | Update | - |
| article html file updated | 4 July 2016 06:21 CEST | Update | - |
| article html file updated | 1 June 2016 13:56 CEST | Original file | - |
| article xml uploaded. | 1 June 2016 13:55 CEST | Original file | https://www.mdpi.com/2227-7390/4/2/36/xml |
| article pdf uploaded. | 1 June 2016 13:55 CEST | Version of Record | https://www.mdpi.com/2227-7390/4/2/36/pdf |
