Petrila, Titus. “ CVBEM for the Fluid Flow Determined by the Motion of a Dirigible Balloon in a Wind Stream”. Rev. Anal. Numér. Théor. Approx. 27, no. 1 (February 1, 1998): 155–165. Accessed September 3, 2025. https://www.ictp.acad.ro/jnaat/journal/article/view/1998-vol27-no1-art16.