| article html file updated | 9 February 2020 12:31 CET | Update | https://www.mdpi.com/2220-9964/7/4/142 |
| article html file updated | 2 October 2019 06:48 CEST | Update | - |
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| article pdf uploaded. | 4 April 2018 13:06 CEST | Updated version of record | https://www.mdpi.com/2220-9964/7/4/142/pdf |
| article xml uploaded. | 4 April 2018 13:06 CEST | Update | https://www.mdpi.com/2220-9964/7/4/142/xml |
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