This paper contains first a definition of the asymptotic expansion at infinity of distributions belonging to □'(R^n), named S-asymptotic expansion, as also its properties and application to partial differential equations.
Liu, M. C. (1969). Some applications of asymptotic approximation [master's thesis, The University of Hong Kong]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0029-1812201200009898