Clapham; et al. (2000). "Gene Transfer by Particle Bombardment to Embryogenic Cultures of Picea abies and the Production of Transgenic Plantlets". Scandinavian Journal of Forest Research. 15 (2): 151–160. doi:10.1080/028275800750014957. S2CID84397445.
Clapham; et al. (2000). "Gene Transfer by Particle Bombardment to Embryogenic Cultures of Picea abies and the Production of Transgenic Plantlets". Scandinavian Journal of Forest Research. 15 (2): 151–160. doi:10.1080/028275800750014957. S2CID84397445.