Home › Authors › Pekka Pietiläinen 👤 Pekka Pietiläinen 3 books Books by Pekka Pietiläinen Quantum Hall Effects 2013 Seasonal fluctuations in the n Seasonal fluctuations in the nitrogen assimilation of Scots pine 1994 Foliar nutrient content and 6- Foliar nutrient content and 6-phosphogluconate dehydrogenase activity in vegetative buds of Scots Pine on a growth disturbance area 1984