| article html file updated | 29 August 2025 23:43 CEST | Update | https://www.mdpi.com/2077-0472/6/4/51 |
| article html file updated | 16 July 2022 03:32 CEST | Update | N/A |
| article html file updated | 7 February 2020 16:07 CET | Update | N/A |
| article html file updated | 5 May 2019 02:04 CEST | Update | N/A |
| article html file updated | 28 December 2016 05:10 CET | Update | N/A |
| article html file updated | 10 October 2016 14:06 CEST | Original file | N/A |
| article xml uploaded. | 10 October 2016 14:05 CEST | Original file | https://www.mdpi.com/2077-0472/6/4/51/xml |
| article pdf uploaded. | 10 October 2016 14:05 CEST | Version of Record | https://www.mdpi.com/2077-0472/6/4/51/pdf |
