text 851 1664 1506 1996
text 150 1892 811 1980
abstract 206 681 753 1360
text 151 1647 807 1814
text 851 914 1506 1547
equation 867 814 1505 912
equation 887 1577 1505 1633
equation 270 1568 805 1624
text 151 1426 806 1547
equation 168 1836 805 1870
title 222 246 1436 341
author 151 442 1484 602
text 851 684 1507 782