Recovery of cryopreserved silver birch shoot tips is affected by the pre-freezing age of the cultures and ammonium substitutionRYYNÄNEN, L. A; HÄGGMAN, H. M.Plant cell reports (Print). 2001, Vol 20, Num 4, pp 354-360, issn 0721-7714Article

Genetic fidelity of cryopreserved embryogenic cultures of open-pollinated Abies cephalonicaARONEN, T. S; KRAJNAKOVA, J; HÄGGMAN, H. M et al.Plant science (Limerick). 1999, Vol 142, Num 2, pp 163-172, issn 0168-9452Article

Cryopreservation of embryogenic cultures of Scots pineHÄGGMAN, H. M; RYYNÄNEN, L. A; ARONEN, T. S et al.Plant cell, tissue and organ culture. 1998, Vol 54, Num 1, pp 45-53, issn 0167-6857Article