| article html file updated | 7 February 2020 20:31 CET | Update | https://www.mdpi.com/2220-9964/6/1/3 |
| article html file updated | 22 September 2019 16:26 CEST | Update | N/A |
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| article html file updated | 8 February 2017 08:40 CET | Update | N/A |
| article html file updated | 30 December 2016 04:45 CET | Original file | N/A |
| article xml uploaded. | 30 December 2016 04:44 CET | Original file | https://www.mdpi.com/2220-9964/6/1/3/xml |
| article pdf uploaded. | 30 December 2016 04:44 CET | Version of Record | https://www.mdpi.com/2220-9964/6/1/3/pdf |
