| article html file updated | 31 August 2025 05:43 CEST | Update | https://www.mdpi.com/2079-9284/6/4/68 |
| article html file updated | 19 July 2022 22:31 CEST | Update | N/A |
| article html file updated | 14 February 2020 15:47 CET | Update | N/A |
| article html file updated | 19 December 2019 06:55 CET | Original file | N/A |
| article pdf uploaded. | 19 December 2019 06:53 CET | Updated version of record | https://www.mdpi.com/2079-9284/6/4/68/pdf |
| article xml uploaded. | 19 December 2019 06:53 CET | Update | https://www.mdpi.com/2079-9284/6/4/68/xml |
| article xml file uploaded | 19 December 2019 06:53 CET | Update | N/A |
| article pdf uploaded. | 4 December 2019 14:11 CET | Version of Record | https://www.mdpi.com/2079-9284/6/4/68/pdf-vor |
| article xml file uploaded | 4 December 2019 14:11 CET | Original file | N/A |
