Competition for wood products becomes tougher when European buyers, who have previously imported from Russia, and are now looking for new suppliers. But this autumn, it is possible that the European market may begin to stabilize again.     ''There is no shortage of Swedish forests, and there is no risk of raw material shortages in Sweden. There will be high pressure in the coming months, but already this autumn we hope that supply and demand can be more in balance,'' says Christian Nielsen, the Swedish Forest Industries' market analyst for wood products.   ...