Banionis, Juozas. “Known and Unknown High Mathematics Conspectus of the End of the 4th Decade of the 20th Century: Z. Žemaitis’s ‘Differential-Integral calculation’: „Diferencialinis-Integralinis skaičiavimas“”. Lietuvos Matematikos Rinkinys, vol. 59, no. B, Dec. 2018, pp. 16-19, https://doi.org/10.15388/LMR.B.2018.2.