**[http://www.orthodoxytoday.org/articles4/ReevesEcumenicism.shtml The Consequences of Orthodox Participation in the Ecumenical Movement on the Orthodox Witness to the Heterodox West], by Fr. John Reeves
**[http://uncutmountain.com/uncut/docs/heers_baptism.pdf The Mystery of Baptism and the Unity of the Church], by Fr. Peter A. Heers
*[http://www.orthodoxinfo.com/ecumenism/Heers-TheMissionaryRootsofModernEcumenism.pdf The Missionary Origins of Modern Ecumenism] by Fr. Peter A. Heers
*[http://www.incommunion.org/articles/essays/orthodoxy-ecumenism In Communion: Orthodoxy & Ecumenism]
===Ecumenical Organizationsorganizations===
* [http://www.wcc-coe.org/ World Council of Churches]
* [http://www.ncccusa.org National Council of Churches]