  
  
  [1XReferences[101X
  
  [[20XAL70[120X]  [16XAtkin,  A.  and Lehner, J.[116X, [17XHecke operators on Γ_0(m) [117X, [18XMath. Ann. [118X,
  [19X185[119X (1970), 134--160.
  
  [[20XBCNS15[120X]  [16XBraun,  O.,  Coulangeon,  R.,  Nebe,  G.  and  Schoennenbeck,  S.[116X,
  [17XComputing  in  arithmetic  groups with Voronoï’s algorithm[117X, [18XJ. Algebra [118X, [19X435[119X
  (2015), 263--285.
  
  [[20XBE14[120X]  [16XBui,  A.  and Ellis, G.[116X, [17XThe homology of SL_2( Z[1/m]) for small m [117X,
  [18XJournal of Algebra[118X, [19X408[119X (2014), 102--108.
  
  [[20XBer16[120X]  [16XBergeron,  N.[116X,  [17XTorsion  homology  growth  in  arithmetic  groups [117X,
  EuropeanMathematical  Society,  European  Congress  of  Mathematicians, July
  18-22 (2016).
  
  [[20XBL87[120X]  [16XBrown,  R.  and  Loday,  J.-L.[116X,  [17XVan Kampen theorems for diagrams of
  spaces [117X, [18X Topology[118X, [19X26[119X (1987), 311--335.
  
  [[20XEHS06[120X]  [16XEllis,  G., Harris, J. and Skoldberg, E.[116X, [17XPolytopal resolutions for
  finite groups [117X, [18X J. Reine Angew. Math.[118X, [19X598[119X (2006), 131--137.
  
  [[20XEic57[120X]  [16XEichler,  M.[116X,  [17XEine  Verallgemeinerung  der  Abelschen  Integrale [117X,
  [18XMathematische Zeitschrift [118X, [19X67[119X (1957), 267--298.
  
  [[20XHat01[120X] [16XHatcher, A.[116X, [17XAlgebraic Topology [117X, Available online (2001).
  
  [[20XKFM08[120X]  [16XKauffman, L. H. and Faria Martins, J.[116X, [17XInvariants of welded virtual
  knots via crossed module invariants of knotted surfaces[117X, [18XCompos. Math.[118X, [19X144[119X,
  4 (2008), 1046--1080.
  
  [[20XKso00[120X]  [16XKsontini,  R.[116X,  [17XProprietes  homotopiques  du complexe de Quillen du
  groupe symetrique[117X, These de doctorat, Universitet de Lausanne (2000).
  
  [[20XKul91[120X]  [16XKulkarni,  R.[116X,  [17XAn  arithmetic-geometric method in the study of the
  subgroups  of the modular group [117X, [18XAmerican Journal of Mathematics [118X, [19X113, No.
  6[119X (1991), 1053--1133.
  
  [[20XMil58[120X] [16XMilnor, J.[116X, [17XOn simply connected 4-manifolds[117X, International symposium
  on  algebraic  topology, Universidad Nacional Autonoma de Mexico and UNESCO,
  Mexico City (1958).
  
  [[20XRah10[120X]  [16XRahm,  A.[116X,  [17XCohomologies  and  K-theory  of  Bianchi  groups  using
  computational   geometric   models   [117X,   These   de   doctorat,   Universite
  Joseph-Fourier -- Grenoble I (2010).
  
  [[20XSat00[120X]  [16XSatoh, S.[116X, [17XVirtual knot presentation of ribbon torus-knots[117X, [18XJ. Knot
  Theory Ramifications[118X, [19X9[119X, 4 (2000), 531--542.
  
  [[20XSen11[120X]  [16XSengun,  M.  H.[116X,  [17XOn  the  Integral  Cohomology of Bianchi Groups [117X,
  [18XExperimental Mathematics [118X, [19X20(4)[119X (2011), 487--505.
  
  [[20XShi59[120X]  [16XShimura,  G.[116X, [17XSur les integrales attachees aux formes automorphes [117X,
  [18XJournal of the Mathematical Society of Japan [118X, [19X67[119X (1959), 291--311.
  
  [[20XSK11[120X]  [16XSpreer,  J.  and  Khuenel,  W.[116X,  [17XCombinatorial  properties of the K3
  surface: Simplicial blowups and slicings[117X, Experimental Mathematics Volume 20
  Issue 2 (2011).
  
  [[20XSte07[120X]  [16XStein,  W.[116X,  [17XModular forms, a computational approach [117X, AMS Graduate
  Studies in Mathematics , [19X79[119X (2007).
  
  [[20XSwa71[120X] [16XSwan, R.[116X, [17XGenerators and relations for certain general linear groups
  [117X, [18XAdvances in Mathematics [118X, [19X6[119X (1971), 1--77.
  
  [[20XWie78[120X]  [16XWieser, G.[116X, [17XComputational arithmetic of modular forms [117X, Universitat
  Duisburg-Essen (2007/8).
  
  
  
  [32X
