HELVACI, M. Et Al. 2004. Amateur and Professional Researches at the Ankara University Observatory. The Journal of the American Association of Variable Star Observers , 212-217.

HELVACI, M., ELMASLI AKÇAR, A., TANRIVERDİ, T., ÖZAVCI, İ., TÖRÜN, M. E., ALBAYRAK, B., ... SELAM, S. O.(2004). Amateur and Professional Researches at the Ankara University Observatory . The Journal of the American Association of Variable Star Observers (pp.212-217).

HELVACI, MUSTAFA Et Al. "Amateur and Professional Researches at the Ankara University Observatory," The Journal of the American Association of Variable Star Observers, 2004

HELVACI, MUSTAFA Et Al. "Amateur and Professional Researches at the Ankara University Observatory." The Journal of the American Association of Variable Star Observers , pp.212-217, 2004

HELVACI, M. Et Al. (2004) . "Amateur and Professional Researches at the Ankara University Observatory." The Journal of the American Association of Variable Star Observers , pp.212-217.

@conferencepaper{conferencepaper, author={MUSTAFA HELVACI Et Al. }, title={Amateur and Professional Researches at the Ankara University Observatory}, congress name={The Journal of the American Association of Variable Star Observers}, city={}, country={}, year={2004}, pages={212-217} }