physica status solidi (b)
physica status solidi (b) > 250 > 1 > 196 - 206
physica status solidi (b) > 250 > 2 > 305 - 317
physica status solidi (b) > 250 > 5 > 994 - 998
physica status solidi (b) > 250 > 7 > 1278 - 1282
physica status solidi (b) > 250 > 9 > 1898 - 1906
physica status solidi (b) > 250 > 10 > 2141 - 2144