Search for: [References = "48. Piermattei A., Renzaglia F., Urbinati C., 2012. Recent expansion of Pinus nigra Arn. above the timberline in the Central Apennines, Italy. Annals of Forest Science, vol. 69, no. 4, pp. 509\-517. https\:\/\/doi.org\/10.1007\/s13595\-012\-0207\-2"]