| article html file updated | 7 February 2020 06:42 CET | Update | https://www.mdpi.com/2227-7390/4/2/22 |
| article html file updated | 5 May 2019 19:49 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:50 CET | Update | N/A |
| article html file updated | 4 July 2016 06:16 CEST | Update | N/A |
| article html file updated | 1 April 2016 11:06 CEST | Original file | N/A |
| article xml uploaded. | 1 April 2016 11:05 CEST | Update | https://www.mdpi.com/2227-7390/4/2/22/xml |
| article pdf uploaded. | 1 April 2016 11:05 CEST | Version of Record | https://www.mdpi.com/2227-7390/4/2/22/pdf |
