Aryavand, A. 1975: Contribution a l' etude eytotaxonomique de quelques Angiosperms de l' Iran. -Bot. Notiser, 128: 299-311.
-1977: IOPB chromosome number reports LVII. -Taxon 26 (4): 443-44.
Cardona, M. A. 1973: Contribution a l' etude eytotaxonomique de la flora des Baleares I. -Acta Phytotax. Barcinonensia 14: 1-20.
D' Amato & Trojani 1985: Giemsa banding and karyotype in three species of Anchusa (Boraginaceae). -Carylogia 38 (1): 13-2l.
Fedorov, A. 1974: Chromosome Numbers of Flowering Plants., 286 pp. -Koeltz, Konigstein.
Fuernkranz, D. 1967: Einige neue Boraginaceen -Chromosomenzahlen. -Oesterr. Bot. Zeitz. 114: 341-345.
Gadella, T. W. J. and Kliphuis, E. 1966: Chromosome Number of Flowering Plants in the Netherlands. II. K. Akad. Wetenschap. Amsterdam Proc., ser. C. 69 (5): 541-556.
Ghaffari, S. M. 1986a: Chromosome number reports XCI. -Taxon 35 (2): 407.
- 1986b: Chromosome number reports XCIII. -Taxon 35 (4): 900-90l.
- 1987: Chromosome number reports XCY. -Taxon 36 (2): 497-498.
- 1988. Chromosome number reports XCIX. -Taxon 37 (2): 397.
Goldblatt, P. 1981: Index to plant chromosome numbers 1975-1978. -Monogr. Syst. Bot. Missouri Bot. Gard. 5: 1-533.
- 1984: Index to plant chromosome numbers 1979-1981. -Monogr. Syst. Bot. Missouri Bot. Gard. 8: 1-427.
- 1985: Index to plant chromosome numbers 1982-1983. -Monogr, Syst. Bot. Missouri Bot. Gard. 13: 1-224.
- 1988: Index to plant chromosome numbers 1984-1985. -Monogr. Syst. Bot. Missouri Bot. Gard. 23: 1-264.
- & D. E. Johnson 1990: Index to Plant chromosome numbers 1986-1987. -Monogr. Syst. Bot. Missouri Bot. Gard. 30: 1-243.
- & - 1991: Index to plant chromosome nubmers 1988-1989. -Monogr. Syst. Bot. Missouri Bot. Gard. 40: 1-238.
- & - 1994: Index to plant chromosome numbers 1990-1991. -Monogr. Syst. Bot. Missouri Bot. Gard. 51: 1-267.
Gustavsson, L. A. 1978. Floristic reports from the high mountains of Sterea ElIas, Greece. 2. -Bot. Notiser 131: 201-213.
Jaarsma, T. A., E. Lohmanns, H. Hendriks, T. Gadella & T. Malingre. 1990. Chemo-and karyotaxonomic studies on some rhizomatous species of the genus Symphytum (Boraginaceae). -PI. Syst. Evoi. 169: 31-39.
Moore, R. J. 1973: Index to plant chromosome numbers for 1967-1971. -Regnum Vegetabile 96: 1-257.
- 1977: Index to plant chromosome numbers for 1973-1974. -Regnum Vegetabile 90: 1-539.
- 1982: Flora Europaea, check-list and chromosome index. -Cambridge, U.K.
Murin, A. & W. Y. Sheikh. 1971: In IOPB chromosome number reports XXXII. -Taxon 20: 349-356.
Ornduff, R. 1967: Index to plant chromosome numbers. –Regnum Vegetabile 50: 1-128.
- 1968: Index to plant chromosome numbers. -Regnum Vegetabile 55: 1-126.
Piennar, R. de V. 1955: Combination and variation of techniques for improvide chromosome studies in the Gramineae. - J. South Ahr. Bot. 21: 108
Podlech, D. and A. Dieterle 1969. Chromosome studien an Afghanischen Pflanzen. -Candollea 24: 185-243.
- and Bader 1974. Chromosome studien an Afghanischen pflanzen II. -Mitt. Bot. Miinchen 11: 457-488.
Popova, T. N. & E. A. Zemskova 1985 : To the Karyosystematics of the genus Onosma (Boraginaceae). -Bot. Znurn. SSSR. 70 (2): 199-205.
Riedl, H. 1967: Boraginaceae in Rechinger, K. H. Flora Iranica no 48. -Graz.
Teppner, H. 1974. Karyosystematics of some Asiatic Onosma species (Boraginaceae). -PI. Syst. Evoi. 123: 61-82.
Vasudevan, K. N. 1975. Contribution to the cytotaxonomy and cytogeography of the Flora of the Western Himalayas Part II. -Ber. Schweiz Bet. Ges. 85: 210-252.
Wilosn, G.B. 1945. The ventian turpentine mounting medium. -Stain Technology 20: 133-135.