| article html file updated | 9 February 2020 02:35 CET | Update | https://www.mdpi.com/2227-9032/6/1/4 |
| article html file updated | 2 May 2019 03:13 CEST | Update | N/A |
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| article html file updated | 28 March 2019 14:28 CET | Update | N/A |
| article html file updated | 27 March 2018 14:35 CEST | Update | N/A |
| article html file updated | 10 January 2018 12:28 CET | Original file | N/A |
| article xml uploaded. | 10 January 2018 12:27 CET | Original file | https://www.mdpi.com/2227-9032/6/1/4/xml |
| article pdf uploaded. | 10 January 2018 12:27 CET | Version of Record | https://www.mdpi.com/2227-9032/6/1/4/pdf |
