G.  Balaji, S.  Vengataasalam, S.  Sekar, 
    Numerical Investigation of Second Order Singular System Using Single-Term Haar Wavelet Series Method,
    Research Journal of Applied Sciences,
    Volume 8,Issue 1,
    2013,
    Pages 9-13,
    ISSN 1815-932x,
    rjasci.2013.9.13,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2013.9.13)
    Abstract: Recently, Single-Term Haar Wavelet series (STHW) is introduced 
  to overcome the difficulties in solving some singular system problems. Preliminary 
  experiments have shown that this method is usually more efficient than the other 
  methods. In this study, STHW is developed to approximate the solution of second 
  order singular system problems in the Ordinary Differential Equations (ODE). 
  These types of problems arisen in science and engineering field frequently. 
  The obtained discrete solutions using the STHW are found to be very accurate 
  and are compared with the exact solutions of the second order singular system 
  problems in the ODE. The results obtained show that the STHW is more useful 
  for solving second order singular system problems in the ODE and the solution 
  can be obtained for any length of time.
    Keywords: Haar wavelet;single-term Haar wavelet series ordinary differential equations;singular systems;second order singular systems