| article html file updated | 8 February 2020 04:05 CET | Update | https://www.mdpi.com/2227-9067/4/4/29 |
| article html file updated | 24 September 2019 10:42 CEST | Update | N/A |
| article html file updated | 4 May 2019 01:16 CEST | Update | N/A |
| article html file updated | 28 April 2017 05:42 CEST | Update | N/A |
| article html file updated | 24 April 2017 14:14 CEST | Original file | N/A |
| article xml uploaded. | 24 April 2017 14:13 CEST | Original file | https://www.mdpi.com/2227-9067/4/4/29/xml |
| article pdf uploaded. | 24 April 2017 14:13 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/4/29/pdf |
| article pdf uploaded. | 21 April 2017 12:30 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/4/29/pdf-vor |
