| article html file updated | 19 June 2018 12:26 CEST | Original file | https://www.mdpi.com/2409-515X/4/2/20 |
| article pdf uploaded. | 19 June 2018 12:24 CEST | Version of Record | https://www.mdpi.com/2409-515X/4/2/20/pdf |
| article xml uploaded. | 19 June 2018 12:24 CEST | Update | https://www.mdpi.com/2409-515X/4/2/20/xml |
| article xml file uploaded | 19 June 2018 12:24 CEST | Original file | N/A |
