| article html file updated | 8 February 2020 11:24 CET | Update | https://www.mdpi.com/2220-9964/6/7/220 |
| article html file updated | 26 September 2019 00:47 CEST | Update | - |
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| article html file updated | 27 March 2019 16:32 CET | Update | - |
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| article html file updated | 19 July 2017 17:06 CEST | Original file | - |
| article xml uploaded. | 19 July 2017 17:05 CEST | Original file | https://www.mdpi.com/2220-9964/6/7/220/xml |
| article pdf uploaded. | 19 July 2017 17:05 CEST | Updated version of record | https://www.mdpi.com/2220-9964/6/7/220/pdf |
