| Authors(s) | Zahradník, J. |
| Year | 1990 |
| Title | 3.9.9.1 Conifers. In: D. Rosen (ed.), Armoured scale insects, their biology, natural enemies and control. Vol. 4B. World Crop Pests. Elsevier, Amsterdam, the Netherlands: 633-644. |
| Authors(s) | Zahradník, J. |
| Year | 1990 |
| Title | 3.9.9.1 Conifers. In: D. Rosen (ed.), Armoured scale insects, their biology, natural enemies and control. Vol. 4B. World Crop Pests. Elsevier, Amsterdam, the Netherlands: 633-644. |