APA

Werner, C., Schnyder, H., Cuntz, M., Keitel, C., Zeeman, M., Dawson, T., Badeck, F., Brugnoli, E., Ghashghaie, J., Grams, T., Kayler, Z., Lakatos, M., Lee, X., Maguas, C., Ogee, J., Rascher, K., Siegwolf, R., Unger, S., Welker, J., Wingate, L., & Gessler, A. (2012). Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales. : Copernicus Publications.