| article html file updated | 26 September 2022 16:28 CEST | Original file | https://www.mdpi.com/2504-3900/2/1/50 |
| article pdf uploaded. | 9 February 2018 12:44 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/1/50/pdf |
| article pdf uploaded. | 3 January 2018 11:46 CET | Version of Record | https://www.mdpi.com/2504-3900/2/1/50/pdf-vor |
