1. Nadolski, W.: Application of wave method in investigations of single gear transmission. Ing. Arch. 58 (1988) 329–333
2. Nadolski, W.: Dynamic investigations of single gear transmission taking into account microcracks. Ing. Arch. 59 (1989) 362–370
3. Fronius, S.: Über die Normung eines Berechnungsverfahrens für Zahnräder. Maschinenbautechnik 9 (1959) 216–221
4. Frenkel, I. N.: Eksperimentalnoje opredelenije summarnoj deformacii i zestkosti prjamych zubjev cilindričeskich zubčatych koles. Sb. Zubčatyje i czervjačnyje peredači. Mašgis, 1959 (in Russian) 163–184.
5. Frenkel, I. N.: Experimental determination of overall deformation and stiffness of gears with spur toothing (in Russian). In: Ed. Toothed wheelsand worm gears, pp. 163–184. Moscow: Mašgis 1959