| article html file updated | 30 August 2025 07:25 CEST | Update | https://www.mdpi.com/2227-9032/6/4/121 |
| article html file updated | 17 July 2022 03:56 CEST | Update | N/A |
| article html file updated | 10 February 2020 13:44 CET | Update | N/A |
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| article html file updated | 26 December 2018 20:52 CET | Update | N/A |
| article html file updated | 1 October 2018 08:41 CEST | Original file | N/A |
| article pdf uploaded. | 1 October 2018 08:40 CEST | Version of Record | https://www.mdpi.com/2227-9032/6/4/121/pdf |
| article xml uploaded. | 1 October 2018 08:40 CEST | Update | https://www.mdpi.com/2227-9032/6/4/121/xml |
| article xml file uploaded | 1 October 2018 08:40 CEST | Original file | N/A |
