| article html file updated | 7 February 2020 04:45 CET | Update | https://www.mdpi.com/2227-7382/4/1/8 |
| article html file updated | 5 May 2019 23:53 CEST | Update | N/A |
| article html file updated | 26 March 2019 21:08 CET | Update | N/A |
| article html file updated | 18 May 2016 12:44 CEST | Original file | N/A |
| article pdf uploaded. | 29 February 2016 10:52 CET | Updated version of record | https://www.mdpi.com/2227-7382/4/1/8/pdf |
| article xml uploaded. | 29 February 2016 10:52 CET | Original file | https://www.mdpi.com/2227-7382/4/1/8/xml |
| article pdf uploaded. | 19 February 2016 15:11 CET | Version of Record | https://www.mdpi.com/2227-7382/4/1/8/pdf-vor |
