| article html file updated | 8 February 2020 07:33 CET | Update | https://www.mdpi.com/2227-9067/4/6/45 |
| article html file updated | 25 September 2019 04:36 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:50 CEST | Update | N/A |
| article html file updated | 27 June 2017 10:01 CEST | Update | N/A |
| article html file updated | 8 June 2017 13:26 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2017 13:25 CEST | Original file | https://www.mdpi.com/2227-9067/4/6/45/xml |
| article pdf uploaded. | 8 June 2017 13:25 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/6/45/pdf |
| article pdf uploaded. | 6 June 2017 14:47 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/6/45/pdf-vor |
