| article html file updated | 30 August 2025 02:30 CEST | Update | https://www.mdpi.com/2076-328X/8/2/21 |
| article html file updated | 16 July 2022 09:02 CEST | Update | N/A |
| article html file updated | 9 February 2020 05:32 CET | Update | N/A |
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| article html file updated | 14 March 2018 08:27 CET | Update | N/A |
| article html file updated | 7 February 2018 10:20 CET | Original file | N/A |
| article xml uploaded. | 7 February 2018 10:19 CET | Original file | https://www.mdpi.com/2076-328X/8/2/21/xml |
| article pdf uploaded. | 7 February 2018 10:19 CET | Updated version of record | https://www.mdpi.com/2076-328X/8/2/21/pdf |
| article pdf uploaded. | 5 February 2018 08:40 CET | Version of Record | https://www.mdpi.com/2076-328X/8/2/21/pdf-vor |
