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2. Roadheader performance in Istanbul, Golden Horn clean-up contributes valuable data;Bilgin;Tunnels and Tunnelling,1988
3. Roadheaders glean valuable tips for Istanbul Metro;Bilgin;Tunnels and Tunnelling,1990
4. Bilgin, N., Yazıcı, S., Eskikaya, S., 1996. A model to predict the performance of roadheaders and impact hammers in tunnel drivages. In: Proceedings, Eurock '96, Balkema, pp. 715–720
5. Bilgin, N., Kuzu, C., Eskikaya, S., 1997. Cutting performance of rock hammers and roadheaders in Istanbul Metro drivages. In: Proceedings, Word Tunnel Congress'97, Tunnels for People, Balkema, pp. 455–460