Balashov Y. A., Larionov A. N., Gannibal L. F., Sirotkin A. N., Tebenkov A. M., Ryüngenen G. I., & Ohta Y. (1993). An Early Proterozoic U-Pb zircon age from an Eskolabreen Formation gneiss in southern Ny Friesland, Spitsbergen. Polar Research, 12(2), 147-152. https://doi.org/10.3402/polar.v12i2.6710