abstract 398 953 1265 1445
title 383 449 2194 515
author 504 563 2107 807
equation 1517 1700 2029 1749
equation 1703 2045 1852 2093
equation 1703 2045 1852 2093
text 403 1533 1269 2678
text 1339 953 2199 1658
text 1343 1792 2201 2009
text 1345 2132 2204 2703