RT Article T1 "Equality of what?" and intergenerational justice JF Ethical perspectives VO 19 IS 3 SP 501 OP 526 A1 Lippert-Rasmussen, Kasper 1964- LA English PB Peeters YR 2012 UL https://www.ixtheo.de/Record/1632183501 DO 10.2143/EP.19.3.2172301