| article html file updated | 30 August 2025 04:13 CEST | Update | https://www.mdpi.com/2218-1997/4/6/69 |
| article html file updated | 16 July 2022 20:56 CEST | Update | N/A |
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| article xml uploaded. | 6 June 2018 13:51 CEST | Update | https://www.mdpi.com/2218-1997/4/6/69/xml |
| article pdf uploaded. | 6 June 2018 13:51 CEST | Updated version of record | https://www.mdpi.com/2218-1997/4/6/69/pdf |
| article html file updated | 1 June 2018 12:30 CEST | Original file | N/A |
| article pdf uploaded. | 1 June 2018 12:28 CEST | Version of Record | https://www.mdpi.com/2218-1997/4/6/69/pdf-vor |
| article xml file uploaded | 1 June 2018 12:28 CEST | Original file | N/A |