[1] BROEK, David: Elementary engineering fracture mechanics. 3rd revised edition 1982, 2nd printing 1983, Martinus Nijhaff Publishers, The Hague, ISBN 90-247-2656-5 .
[2] ANSI/NACE Standard TM 0177-2005, Item. No. 21212. Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosin Creacking in H2S Environment. ISBN 1-57590-036-X .
[3] NACE Standard TM 0284-2003, Item. No. 21215. Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking.