| article html file updated | 8 February 2020 17:44 CET | Update | https://www.mdpi.com/2227-9717/5/4/56 |
| article html file updated | 27 September 2019 12:54 CEST | Update | N/A |
| article html file updated | 2 May 2019 22:51 CEST | Update | N/A |
| article html file updated | 2 January 2018 11:39 CET | Update | N/A |
| article html file updated | 9 October 2017 05:57 CEST | Original file | N/A |
| article xml uploaded. | 9 October 2017 05:56 CEST | Original file | https://www.mdpi.com/2227-9717/5/4/56/xml |
| article pdf uploaded. | 9 October 2017 05:56 CEST | Updated version of record | https://www.mdpi.com/2227-9717/5/4/56/pdf |
| article pdf uploaded. | 3 October 2017 12:14 CEST | Version of Record | https://www.mdpi.com/2227-9717/5/4/56/pdf-vor |
