Julkaisut - Selaus tekijän mukaan "Häkkinen, R."
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Analyses of climatic warming based on bud burst and flowering time series of trees in Finland 1846-2005
Häkkinen, R.; Hari, P.; Linkosalo, T.; Terhivuo, J.; Tuomenvirta, H. (2006) -
Anatomy and morphology in developing vegetative buds on detached Norway spruce branches in controlled conditions before bud burst
Sutinen, S.; Partanen, J.; Viherä-Aarnio, A.; Häkkinen, R.
Tree Physiology (2009) -
Annual cycle of processes
Hänninen, H.; Hari, P.; Häkkinen, R.; Linkosalo, T. (Springer, 2008) -
Bud burst in Norway spruce (Picea abies): preliminary evidence for age-specific rest patterns
Partanen, J.; Hänninen, H.; Häkkinen, R.
Trees - Structure and Function (2005) -
Bud burst phenology
Hänninen, H.; Linkosalo, T.; Häkkinen, R.; Hari, P. (Springer, 2008) -
Changes in temperature sum and frost damage risk at the beginning of growing season in Finland over the last 100 years
Häkkinen, R.; Heinonen, J.
International Forestry Review : 5 (2005) -
Colposcopy referral rate can be reduced by high-risk human papillomavirus triage in the management of recurrent atypical squamous cells of undetermined significance or low-grade squamous intraepithelial lesion cytology in Finland
Jakobson, M.; Tarkkanen, J.; Auvinen, E.; Häkkinen, R.; Laurila, P.; Tapper, A.M.
International Journal of STD & AIDS (2012) -
Critical night length for bud set and its variation in two photoperiodic ecotypes of Betula pendula
Viherä-Aarnio, A.; Häkkinen, R.; Junttila, O.
Tree Physiology : 8 (2006) -
Development and growth of primordial shoots in Norway spruce buds before visible bud burst in relation to time and temperature in the field
Sutinen, S.; Partanen, J.; Viherä-Aarnio, A.; Häkkinen, R.
Tree Physiology : 8 (2012) -
Effect of photoperiod and stage of development on timing of growth cessation of silver birch (Betula pendula) seedlings from different latitudinal ecotypes
Viherä-Aarnio, A.; Partanen, J.; Häkkinen, R.; Luomajoki, A.; Koski, V. (2002) -
Effects of dormancy and environmental factors on timing of bud burst in Betula pendula
Häkkinen, R.; Linkosalo, T.; Hari, P.
Tree Physiology (1998) -
Effects of seed origin and sowing time on timing of height growth cessation of Betula pendula seedlings
Viherä-Aarnio, A.; Häkkinen, R.; Partanen, J.; Luomajoki, A.; Koski, V.
Tree Physiology : 1 (2005) -
Flowering time and frost damage risk to Vaccinium myrtillus, the common Blueberry, in Finland 1898-2000
Heinonen, J.; Häkkinen, R.
International Forestry Review : 5 (2005) -
Improving the reliability of a combined phenological time series by analyzing observation quality
Linkosalo, T.; Häkkinen, R.; Hari, P.
Tree Physiology (1996) -
Length of growth period of silver birch (Betula pendula) seedlings as a function of latitude of seed origin and sowing time
Partanen, J.; Häkkinen, R.; Viherä-Aarnio, A.; Luomajoki, A.; Koski, V. (2003) -
Length of growth period of silver birch (Betula pendula) seedlings as function of latitude of seed origin and sowing time
Partanen, J.; Häkkinen, R.; Viherä-Aarnio, A.; Luomajoki, A.; Koski, V.
Rit Mógilsár Rannsóknasstödvar Skógraektar : 21 (2004) -
Methods for combining phenological time series: application to bud burst in birch (Betula pendula) in Central Finland for the period 1896-1955
Häkkinen, R.; Linkosalo, T.; Hari, P.
Tree Physiology : 11 (1995) -
Metsäntutkimuslaitoksen kenttäkokeiden evaluointi. Työryhmän raportti 31.12.2001
Mälkönen, E.; Häkkinen, R.; Isomäki, A.; Lepistö, M.; Penttilä, T. (2001) -
Microscopic development of vegetative buds of Norway spruce (Picea abies) in relation to temperature and visible bud phenology
Sutinen, S.; Partanen, J.; Viherä-Aarnio, A.; Häkkinen, R.
Publications of the University of Eastern Finland, Reports and Studies in Forestry and Natural Sciences : 1 (2010) -
Mikroskooppimenetelmä vuosirytmin tutkimisessa
Sutinen, S.; Partanen, J.; Viherä-Aarnio, A.; Häkkinen, R. (2008)