array(2) { [0]=> int(0) [1]=> array(12) { ["ref_doc_id"]=> int(9615901) ["publisher_code"]=> int(54) ["base_code"]=> int(35) ["book_code"]=> int(1) ["page"]=> string(3) "123" ["sort"]=> int(104) ["body"]=> string(255) "1) Tajik, A. J., Seward, J. B., Hagler, D. J., Mair, D. D., Lie, J. T.:Two-dimensional real-time ultrasonic imaging of the heart and great vessels. Technique, image orientation, structure, identification and validation. May. Clin. Proc., 53:271-303, 1978." ["mol"]=> NULL ["pubmed"]=> string(6) "642598" ["doi"]=> NULL ["group_id"]=> int(5) ["internal_flag"]=> bool(false) } }