References PRDpp. 7, 106, 123–125, 128 anonpp. 3, 09, 21, 47, 55–56, 63, 147–149 Systempp. 4, 08, 14–15, 18–22, 24, 26–30, 32–33, 38–41, 53, 58, 120, 179, 217–218, 251, 277, 285, 310