Professor Czesław Radzikowski has finished 90 years on July 17, 2019. xxxxxxx xxx xxxxx xxxxxx xxxxxxx xxxxxxxxxx xxxxxx xxxxxxxxxx xxxxxxxxxx xx xxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxx xxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxx xxxxxxxxxx xx x xxxxxxxx xxxxxx xxxxx xxxxxxx xxxxxxx x xxxxxxxx xxxxx xx xxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxx xxxx xxxxxxxxx xxxxxxx xxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxx xxxxxxxxxxx xxxx xxxxxxxxxxx xxxxxx xxxxxx xxxxxx xxxxx x x xxxxxxxx xxxxx xxxxxxxxx xxxxxxxxx xxxxxxxx xxxxxxx xxxxxxxx xxxxxxx xxxxxxxxx xxxxxxxxxxxx xxxxxxxxxx xxxxxxx xxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxx xx xxxxxx xxxxxxxxxxx xxxxxx xxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxx xxxxxxxx x xxxxxxxxxxxx xxx xxxxxxx xxxxx xxxxxxxxxxx xxxxxxxxx xxxxxxxxxxx xxxxxxxxxxx xxxxx xxxxxx xxxxxx xxxxxxxx xxxxxxxxxxx xxxxxxxxxxxxx xxxxxx xxxxxxx xxxxxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxxxx xxxxx xxxxxxx xxxxxxxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxx xx xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxx xxxxxxxxxxxx xxxx xxxxxxxx xxxxxxxx xxxxxxxxxx xxxxxx xxxxxxx xxxxx xxxxxxxxxx xxxxxxxxx xxxxxxxxxxx xxxxx xxxxxxxx xxxxxxxxxxx xxxxxxxxxxxx xxxx xxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxxx xxxxxx xxxx