المؤلفون: Schmidt-Belz, Barbara, Laamanen, Heimo, Poslad, Stefan, Zipf, Alexander

المصدر: Information and Communication Technologies in Tourism 2003 ; page 115-123 ; ISBN 9783211839102 9783709160275

الإتاحة: https://doi.org/10.1007/978-3-7091-6027-5_13Test

المؤلفون: Poslad, Stefan, Malaka, Rainer, Schmidt-Belz, Barbara

المصدر: City Tourism 2002 ; page 296-302 ; ISBN 9783211838310 9783709161258

الإتاحة: https://doi.org/10.1007/978-3-7091-6125-8_29Test

المؤلفون: Schmidt-Belz, Barbara, Makelainen, Milla, Nick, Achim, Poslad, Stefan

المصدر: Information and Communication Technologies in Tourism 2002 ; page 275-284 ; ISBN 9783211837801 9783709161326

الإتاحة: https://doi.org/10.1007/978-3-7091-6132-6_28Test