| article html file updated | 12 February 2020 21:06 CET | Update | https://www.mdpi.com/2226-471X/4/2/44 |
| article html file updated | 21 June 2019 04:02 CEST | Original file | - |
| article pdf uploaded. | 21 June 2019 04:01 CEST | Updated version of record | https://www.mdpi.com/2226-471X/4/2/44/pdf |
| article xml uploaded. | 21 June 2019 04:01 CEST | Update | https://www.mdpi.com/2226-471X/4/2/44/xml |
| article xml file uploaded | 21 June 2019 04:01 CEST | Update | - |
| article pdf uploaded. | 20 June 2019 16:43 CEST | Version of Record | https://www.mdpi.com/2226-471X/4/2/44/pdf-vor |
| article xml file uploaded | 20 June 2019 16:43 CEST | Original file | - |
