| article html file updated | 30 August 2025 09:47 CEST | Update | https://www.mdpi.com/2227-9040/6/4/64 |
| article html file updated | 21 August 2025 20:25 CEST | Update | - |
| article html file updated | 17 July 2022 14:38 CEST | Update | - |
| article html file updated | 11 February 2020 02:21 CET | Update | - |
| article html file updated | 11 October 2019 18:07 CEST | Update | - |
| article html file updated | 27 April 2019 21:17 CEST | Update | - |
| article html file updated | 13 April 2019 17:08 CEST | Update | - |
| article html file updated | 2 April 2019 10:56 CEST | Update | - |
| article html file updated | 26 December 2018 09:30 CET | Update | - |
| article html file updated | 16 December 2018 11:05 CET | Original file | - |
| article pdf uploaded. | 16 December 2018 11:04 CET | Updated version of record | https://www.mdpi.com/2227-9040/6/4/64/pdf |
| article xml uploaded. | 16 December 2018 11:04 CET | Update | https://www.mdpi.com/2227-9040/6/4/64/xml |
| article xml file uploaded | 16 December 2018 11:04 CET | Update | - |
| article pdf uploaded. | 10 December 2018 15:21 CET | Updated version of record | https://www.mdpi.com/2227-9040/6/4/64/pdf-vor |
| article pdf uploaded. | 10 December 2018 15:09 CET | Version of Record | https://www.mdpi.com/2227-9040/6/4/64/pdf-vor |
| article xml file uploaded | 10 December 2018 15:09 CET | Original file | - |
