| article html file updated | 8 February 2020 23:45 CET | Update | https://www.mdpi.com/2076-3271/5/4/33 |
| article html file updated | 29 September 2019 03:15 CEST | Update | - |
| article html file updated | 2 May 2019 09:17 CEST | Update | - |
| article html file updated | 18 April 2019 07:01 CEST | Update | - |
| article html file updated | 14 March 2018 17:47 CET | Update | - |
| article html file updated | 12 December 2017 10:15 CET | Original file | - |
| article xml uploaded. | 12 December 2017 10:14 CET | Original file | https://www.mdpi.com/2076-3271/5/4/33/xml |
| article pdf uploaded. | 12 December 2017 10:14 CET | Updated version of record | https://www.mdpi.com/2076-3271/5/4/33/pdf |
| article pdf uploaded. | 11 December 2017 13:51 CET | Version of Record | https://www.mdpi.com/2076-3271/5/4/33/pdf-vor |
