| article html file updated | 8 February 2020 19:43 CET | Update | https://www.mdpi.com/2227-9032/5/4/81 |
| article html file updated | 28 September 2019 01:56 CEST | Update | - |
| article html file updated | 2 May 2019 18:22 CEST | Update | - |
| article html file updated | 2 January 2018 12:42 CET | Update | - |
| article html file updated | 28 October 2017 11:20 CEST | Original file | - |
| article xml uploaded. | 28 October 2017 11:19 CEST | Original file | https://www.mdpi.com/2227-9032/5/4/81/xml |
| article pdf uploaded. | 28 October 2017 11:19 CEST | Version of Record | https://www.mdpi.com/2227-9032/5/4/81/pdf |
