| article html file updated | 8 February 2020 05:16 CET | Update | https://www.mdpi.com/2227-9091/5/2/28 |
| article html file updated | 24 September 2019 16:49 CEST | Update | N/A |
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| article html file updated | 30 June 2017 09:13 CEST | Update | N/A |
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| article html file updated | 6 May 2017 13:39 CEST | Original file | N/A |
| article xml uploaded. | 6 May 2017 13:38 CEST | Original file | https://www.mdpi.com/2227-9091/5/2/28/xml |
| article pdf uploaded. | 6 May 2017 13:38 CEST | Version of Record | https://www.mdpi.com/2227-9091/5/2/28/pdf |
