| article html file updated | 15 August 2026 21:14 CEST | Update | https://www.mdpi.com/2227-9067/6/4/56 |
| article html file updated | 12 February 2020 03:50 CET | Update | N/A |
| article html file updated | 17 October 2019 23:04 CEST | Update | N/A |
| article html file updated | 8 May 2019 20:08 CEST | Update | N/A |
| article html file updated | 25 April 2019 15:13 CEST | Update | N/A |
| article html file updated | 21 April 2019 12:05 CEST | Original file | N/A |
| article pdf uploaded. | 21 April 2019 12:04 CEST | Updated version of record | https://www.mdpi.com/2227-9067/6/4/56/pdf |
| article xml uploaded. | 21 April 2019 12:04 CEST | Update | https://www.mdpi.com/2227-9067/6/4/56/xml |
| article xml file uploaded | 21 April 2019 12:04 CEST | Update | N/A |
| article pdf uploaded. | 8 April 2019 16:16 CEST | Version of Record | https://www.mdpi.com/2227-9067/6/4/56/pdf-vor |
| article xml file uploaded | 8 April 2019 16:16 CEST | Original file | N/A |
