Fossil plants, Vol. 1: [A text-book] for students of botany and geology

by A. C. Seward

[15] Schlotheim (04).

[16] Sternberg (20).

[17] Brongniart (28) (28²) (49).

[18] Brongniart (39).

[19] Heer (55) (68) (76).

[20] Lesquereux (66) (70) (80) etc.

[21] Zigno (56).

[22] Massalongo (51).

[23] Saporta (72) (73).

[24] Ettingshausen (79). Also numerous papers on fossil plants from Austria and other countries.