@ARTICLE{Kukela_A._Non-destructive_2013,
 author={Kukela, A. and Seglins, V.},
 volume={Vol. 30},
 number={Iss. 2},
 journal={Studia Quaternaria},
 howpublished={online},
 year={2013},
 publisher={Committee for Quaternary Research PAS},
 publisher={Institute of Geological Sciences PAS},
 title={Non-destructive methods for evaluation of the state of preservation in historical stone monuments:the case study of the Step Pyramid in Saqqara},
 URL={http://journals.pan.pl/Content/98290/mainfile.pdf},
}