| article html file updated | 7 February 2020 08:08 CET | Update | https://www.mdpi.com/2227-7390/4/2/31 |
| article html file updated | 5 May 2019 16:53 CEST | Update | N/A |
| article html file updated | 27 March 2019 03:38 CET | Update | N/A |
| article html file updated | 4 July 2016 06:18 CEST | Update | N/A |
| article html file updated | 4 May 2016 08:54 CEST | Original file | N/A |
| article xml uploaded. | 4 May 2016 08:53 CEST | Original file | https://www.mdpi.com/2227-7390/4/2/31/xml |
| article pdf uploaded. | 4 May 2016 08:53 CEST | Version of Record | https://www.mdpi.com/2227-7390/4/2/31/pdf |
