| article html file updated | 26 September 2022 12:20 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/309 |
| article pdf uploaded. | 23 March 2018 04:30 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/309/pdf |
| article pdf uploaded. | 22 February 2018 04:24 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/309/pdf-vor |
| article pdf uploaded. | 14 February 2018 09:47 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/309/pdf-vor |
