ISBN 978-0-8264-4073-0*http://www.vatican.va/roman_curia/congregations/cfaith/cti_documents/rc_con_cfaith_doc_20070419_un-baptised-infants_en.html an article explaining the Catholic opinion on the idea of limbo* Stewart Salmond - The Christian Doctrine of Immortality* Dictionary of the History of Ideas: "Death and Immortality"* (Extensive 1878 text by William Rounseville Alger)* Online version of Swedenborg's "Heaven and Hell" (Swedenborg Foundation 1949, new translation 2002)* Online searchable copy of Swedenborg's "Heaven and Hell" also known as the underworld in Ancient Greece.
==External links==* Islamic view on life after death* Catholic view on life after death* Catholic opinion on the idea of limbo* Stewart Salmond—Christian Doctrine of Immortality* Dictionary of the History of Ideas: "Death and Immortality"* (Extensive 1878 text by William Rounseville Alger)* Online version of Swedenborg's "Heaven and Hell" (Swedenborg Foundation 1949, new translation 2002)* Online searchable copy of Swedenborg's "Heaven and Hell" also known as the underworld in Ancient Greece