| article html file updated | 8 February 2020 22:52 CET | Update | https://www.mdpi.com/2306-5729/2/4/40 |
| article html file updated | 28 September 2019 22:11 CEST | Update | - |
| article html file updated | 2 May 2019 11:13 CEST | Update | - |
| article html file updated | 18 April 2019 08:51 CEST | Update | - |
| article html file updated | 4 December 2017 05:37 CET | Original file | - |
| article xml uploaded. | 4 December 2017 05:36 CET | Update | https://www.mdpi.com/2306-5729/2/4/40/xml |
| article xml uploaded. | 4 December 2017 05:36 CET | Original file | - |
| article pdf uploaded. | 4 December 2017 05:36 CET | Updated version of record | https://www.mdpi.com/2306-5729/2/4/40/pdf |
| article pdf uploaded. | 1 December 2017 17:12 CET | Version of Record | https://www.mdpi.com/2306-5729/2/4/40/pdf-vor |
