| article html file updated | 7 February 2020 08:38 CET | Update | https://www.mdpi.com/2311-5521/1/2/15 |
| article html file updated | 5 May 2019 15:55 CEST | Update | - |
| article html file updated | 27 March 2019 04:35 CET | Update | - |
| article html file updated | 27 October 2017 10:21 CEST | Update | - |
| article html file updated | 16 May 2016 08:07 CEST | Original file | - |
| article xml uploaded. | 16 May 2016 08:05 CEST | Update | https://www.mdpi.com/2311-5521/1/2/15/xml |
| article pdf uploaded. | 16 May 2016 08:05 CEST | Updated version of record | https://www.mdpi.com/2311-5521/1/2/15/pdf |
| article pdf uploaded. | 13 May 2016 09:09 CEST | Version of Record | https://www.mdpi.com/2311-5521/1/2/15/pdf-vor |
