physica status solidi (b)
physica status solidi (b) > 250 > 4 > 864 - 869
physica status solidi (b) > 250 > 4 > 765 - 768
physica status solidi (b) > 250 > 8 > 1519 - 1525
physica status solidi (b) > 250 > 9 > 1810 - 1815
physica status solidi (b) > 250 > 10 > 2106 - 2109