I am collecting all possible information on genus Impatiens (see my project https://www.researchgate.net/project/Balsaminaceae-literature-database). Thanks to your project I just downloaded one paper unaccessible for me earlier.
Among my references are at least two older ones, one from 1983 and one from 1953, still unaccessible for me. So if you plan further digitalization I will simply wait for your further inputs, if no, I will try other ways to get these papers.
Nice work, by the way. Keep it up!
Best regards Wojciech Adamowski