| article html file updated | 26 September 2022 11:08 CEST | Original file | https://www.mdpi.com/2504-3900/2/1/69 |
| article pdf uploaded. | 13 March 2018 13:29 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/1/69/pdf |
| article pdf uploaded. | 1 February 2018 12:41 CET | Version of Record | https://www.mdpi.com/2504-3900/2/1/69/pdf-vor |
