| article html file updated | 8 February 2020 02:35 CET | Update | https://www.mdpi.com/2077-0383/6/4/40 |
| article html file updated | 24 September 2019 02:09 CEST | Update | - |
| article html file updated | 4 May 2019 04:18 CEST | Update | - |
| article html file updated | 28 April 2017 06:48 CEST | Update | - |
| article html file updated | 13 April 2017 08:19 CEST | Update | - |
| article xml uploaded. | 13 April 2017 08:18 CEST | Update | https://www.mdpi.com/2077-0383/6/4/40/xml |
| article pdf uploaded. | 13 April 2017 08:18 CEST | Updated version of record | https://www.mdpi.com/2077-0383/6/4/40/pdf |
| article html file updated | 30 March 2017 14:33 CEST | Original file | - |
| article pdf uploaded. | 30 March 2017 14:32 CEST | Version of Record | https://www.mdpi.com/2077-0383/6/4/40/pdf-vor |
