1. P. Almquist, Type of Service in the Internet Protocol Suite, Network Working Group RFC 1349, July 1992
2. Y. Baguette, Enhanced Transport Service Definition (Informal specification in English - Version 1), ISO/IEC JTCI/SC6/WG4/N822, 19 Apr. 1993, 85 p. (R2060/ULg/CIO/DS/P/003/b1, Feb. 1993, SART 93/03/15)
3. Y. Baguette, L. Leonard, G. Leduc, A. Danthine, Belgian National Body Contribution - Four Types of Enhanced Transport Services and their LOTOS Specifications, SC6 plenary meeting, San Diego, July 8–22, 1992, ISO/IEC JTC1/SC6 N7323, May 1992, 58 p. (OSI 95/ULg/A/22/TR/P, May 1992, SART 92/12/09).
4. Y. Baguette, L. Leonard, G. Leduc, A. Danthine, O. Bonaventure, OSI 95 Enhanced Transport Facilities and Functions, OSI 95/Deliverable ULg-A/P, Dec.1992, 277 p. (SARI 92/25/05)
5. Y. Baguette, L. Leonard, G. Leduc, A. Danthine,OSI 95 Enhanced Transport Services, ISO/IEC JTC1/SC6/WG4/N821, 19 Apr. 1993, 107 p. (R2060/ULg/CIO/DS/S/002/b1, Jan. 1993, SART 93/02/15)