| article html file updated | 30 August 2025 02:33 CEST | Update | https://www.mdpi.com/2218-1997/4/2/28 |
| article html file updated | 16 July 2022 09:07 CEST | Update | N/A |
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| article html file updated | 11 February 2018 03:41 CET | Update | N/A |
| article xml uploaded. | 11 February 2018 03:40 CET | Update | https://www.mdpi.com/2218-1997/4/2/28/xml |
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| article pdf uploaded. | 11 February 2018 03:40 CET | Updated version of record | https://www.mdpi.com/2218-1997/4/2/28/pdf |
| article html file updated | 8 February 2018 17:27 CET | Original file | N/A |
| article xml uploaded. | 8 February 2018 17:26 CET | Original file | N/A |
| article pdf uploaded. | 8 February 2018 17:26 CET | Version of Record | https://www.mdpi.com/2218-1997/4/2/28/pdf-vor |
