Dr. Piotra Murzionak participated in The 5th Oskar Halecki Symposium. Please see the videos from that event:
https://tvinterpolonia.pl/?pn=40001418 You can see Dr.Piotra's presentation in the 10th chapter
https://tvinterpolonia.pl/?pn=40001418 You can see Dr.Piotra's presentation in the 10th chapter