| article html file updated | 7 February 2020 10:25 CET | Update | https://www.mdpi.com/2227-9709/3/2/8 |
| article html file updated | 5 May 2019 12:28 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:56 CET | Update | N/A |
| article html file updated | 30 October 2017 08:34 CET | Update | N/A |
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| article html file updated | 18 June 2016 11:59 CEST | Original file | N/A |
| article xml uploaded. | 18 June 2016 11:58 CEST | Original file | https://www.mdpi.com/2227-9709/3/2/8/xml |
| article pdf uploaded. | 18 June 2016 11:58 CEST | Version of Record | https://www.mdpi.com/2227-9709/3/2/8/pdf |
