Ice nucleation and frost resistance of Pinus canariensis seedlings bearing needles in three different developmental states Vanessa C. Luis, Dunja Taschler, Juergüen Hacker, María Soledad Jiménez, Gerhard Wieser and Gilbert NeunerAnn. For. Sci., 64 2 (2007) 177-182DOI: https://doi.org/10.1051/forest:2006102