| article html file updated | 30 August 2025 09:50 CEST | Update | https://www.mdpi.com/2221-3759/6/4/30 |
| article html file updated | 21 August 2025 20:25 CEST | Update | - |
| article html file updated | 17 July 2022 14:56 CEST | Update | - |
| article html file updated | 11 February 2020 02:35 CET | Update | - |
| article html file updated | 11 October 2019 19:27 CEST | Update | - |
| article html file updated | 27 April 2019 20:47 CEST | Update | - |
| article html file updated | 13 April 2019 16:38 CEST | Update | - |
| article html file updated | 2 April 2019 11:35 CEST | Update | - |
| article html file updated | 25 December 2018 03:54 CET | Update | - |
| article html file updated | 14 December 2018 08:35 CET | Original file | - |
| article pdf uploaded. | 14 December 2018 08:34 CET | Updated version of record | https://www.mdpi.com/2221-3759/6/4/30/pdf |
| article xml uploaded. | 14 December 2018 08:34 CET | Update | https://www.mdpi.com/2221-3759/6/4/30/xml |
| article xml file uploaded | 14 December 2018 08:34 CET | Update | - |
| article pdf uploaded. | 11 December 2018 14:08 CET | Updated version of record | https://www.mdpi.com/2221-3759/6/4/30/pdf-vor |
| article pdf uploaded. | 11 December 2018 13:58 CET | Version of Record | https://www.mdpi.com/2221-3759/6/4/30/pdf-vor |
| article xml file uploaded | 11 December 2018 13:58 CET | Original file | - |
