| article html file updated | 8 February 2020 22:45 CET | Update | https://www.mdpi.com/2218-6581/6/4/37 |
| article html file updated | 28 September 2019 21:24 CEST | Update | - |
| article html file updated | 2 May 2019 11:31 CEST | Update | - |
| article html file updated | 18 April 2019 09:08 CEST | Update | - |
| article html file updated | 2 January 2018 10:46 CET | Update | - |
| article html file updated | 1 December 2017 20:29 CET | Original file | - |
| article xml uploaded. | 1 December 2017 20:28 CET | Update | https://www.mdpi.com/2218-6581/6/4/37/xml |
| article xml uploaded. | 1 December 2017 20:28 CET | Original file | - |
| article pdf uploaded. | 1 December 2017 20:28 CET | Updated version of record | https://www.mdpi.com/2218-6581/6/4/37/pdf |
| article pdf uploaded. | 1 December 2017 11:16 CET | Version of Record | - |
