| article html file updated | 8 February 2020 17:09 CET | Update | https://www.mdpi.com/2227-9091/5/4/54 |
| article html file updated | 27 September 2019 09:01 CEST | Update | N/A |
| article html file updated | 3 May 2019 00:06 CEST | Update | N/A |
| article html file updated | 2 January 2018 14:27 CET | Update | N/A |
| article html file updated | 25 September 2017 15:50 CEST | Original file | N/A |
| article xml uploaded. | 25 September 2017 15:48 CEST | Original file | https://www.mdpi.com/2227-9091/5/4/54/xml |
| article pdf uploaded. | 25 September 2017 15:48 CEST | Version of Record | https://www.mdpi.com/2227-9091/5/4/54/pdf |
