Author not established. Estifanos Syum. Date not established. EHREA archive: /library/documents/doc-84f38acedd2f3820edcd2b83/
[1] Estifanos Syum. Original source: http://www.ehrea.org/Sse.pdf. Preserved original: /library/originals/dcecce48bec53e33ff3b363e380880c6af6409aa7a46714c819ae29cc64b3ef6.pdf. SHA-256: dcecce48bec53e33ff3b363e380880c6af6409aa7a46714c819ae29cc64b3ef6