| article html file updated | 14 August 2026 18:59 CEST | Update | https://www.mdpi.com/2310-2861/3/4/42 |
| article html file updated | 8 February 2020 20:41 CET | Update | N/A |
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| article xml uploaded. | 21 December 2017 11:13 CET | Original file | https://www.mdpi.com/2310-2861/3/4/42/xml |
| article pdf uploaded. | 21 December 2017 10:58 CET | Updated version of record | https://www.mdpi.com/2310-2861/3/4/42/pdf |
| article pdf uploaded. | 8 November 2017 12:15 CET | Version of Record | https://www.mdpi.com/2310-2861/3/4/42/pdf-vor |
