| article html file updated | 14 August 2026 18:01 CEST | Update | https://www.mdpi.com/2218-1989/7/4/50 |
| article html file updated | 30 August 2025 01:21 CEST | Update | N/A |
| article html file updated | 16 July 2022 06:40 CEST | Update | N/A |
| article html file updated | 8 February 2020 17:49 CET | Update | N/A |
| article html file updated | 27 September 2019 13:23 CEST | Update | N/A |
| article html file updated | 2 May 2019 22:42 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:26 CET | Update | N/A |
| article html file updated | 9 November 2017 04:06 CET | Update | N/A |
| article xml uploaded. | 9 November 2017 04:05 CET | Update | https://www.mdpi.com/2218-1989/7/4/50/xml |
| article pdf uploaded. | 9 November 2017 04:05 CET | Updated version of record | https://www.mdpi.com/2218-1989/7/4/50/pdf |
| article pdf uploaded. | 10 October 2017 08:10 CEST | Updated version of record | https://www.mdpi.com/2218-1989/7/4/50/pdf-vor |
| article html file updated | 9 October 2017 04:20 CEST | Original file | N/A |
| article xml uploaded. | 9 October 2017 04:19 CEST | Update | N/A |
| article xml uploaded. | 9 October 2017 04:19 CEST | Original file | N/A |
| article pdf uploaded. | 9 October 2017 04:19 CEST | Updated version of record | https://www.mdpi.com/2218-1989/7/4/50/pdf-vor |
| article pdf uploaded. | 4 October 2017 11:04 CEST | Version of Record | https://www.mdpi.com/2218-1989/7/4/50/pdf-vor |
