| article html file updated | 8 February 2020 11:13 CET | Update | https://www.mdpi.com/2227-9709/4/3/22 |
| article html file updated | 25 September 2019 23:50 CEST | Update | N/A |
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| article html file updated | 27 March 2019 16:11 CET | Update | N/A |
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| article xml uploaded. | 18 July 2017 14:12 CEST | Original file | https://www.mdpi.com/2227-9709/4/3/22/xml |
| article pdf uploaded. | 18 July 2017 14:12 CEST | Version of Record | https://www.mdpi.com/2227-9709/4/3/22/pdf |
