| article html file updated | 7 February 2020 07:31 CET | Update | https://www.mdpi.com/2227-7080/4/2/13 |
| article html file updated | 5 May 2019 18:08 CEST | Update | N/A |
| article html file updated | 27 March 2019 02:23 CET | Update | N/A |
| article html file updated | 20 April 2016 09:05 CEST | Original file | N/A |
| article xml uploaded. | 20 April 2016 09:03 CEST | Original file | https://www.mdpi.com/2227-7080/4/2/13/xml |
| article pdf uploaded. | 20 April 2016 09:03 CEST | Version of Record | https://www.mdpi.com/2227-7080/4/2/13/pdf |
