↑W Goldring, «The oldest known petrified forest», Sci. Mthly, vol.24, , p.514–529
12W.E. Stein, F. Mannolini, L. V. Hernick, E. Landing et C. M. Berry, «Giant cladoxylopsid trees resolve the enigma of the Earth's earliest forest stumps at Gilboa.», Nature, vol.446, no7138, , p.904–7 (PMID17443185, DOI10.1038/nature05705, S2CID2575688)