| article html file updated | 8 February 2020 05:16 CET | Update | https://www.mdpi.com/2309-608X/3/2/21 |
| article html file updated | 24 September 2019 16:50 CEST | Update | N/A |
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| article html file updated | 11 December 2018 08:54 CET | Update | N/A |
| article html file updated | 23 May 2017 03:50 CEST | Update | N/A |
| article html file updated | 6 May 2017 14:14 CEST | Original file | N/A |
| article xml uploaded. | 6 May 2017 14:13 CEST | Original file | https://www.mdpi.com/2309-608X/3/2/21/xml |
| article pdf uploaded. | 6 May 2017 14:13 CEST | Version of Record | https://www.mdpi.com/2309-608X/3/2/21/pdf |
