by Pitchenik, Arthur E, Russell, Bertrand W, Cleary, Timothy, Pejovic, Ilija, Cole, Clifford, Snider, Dixie E
Published in The New England journal of medicine (15.07.1982)

by Russell, Bertrand
Year of Publication 1996

by Murray, D. A.
Published in The Philosophical Review (01.01.1899)