2018. Robert GEISINGER, On the requirement of sufficient maturity for candidates to the presbyterate (c. 1031 §1), with a consideration of canonical maturity and matrimonial jurisprudence (1989-1990), Editrice Pontificia Università Gregoriana, Roma 1999, 273 pp. Ius Canonicum. 41, 82 (Jan. 2018), 778–780. DOI:https://doi.org/10.15581/016.41.15880.