@article{SMJ2_2006_32_4_a7,
     author = {Kutev, Nikolai},
     title = {Geometrical {Methods} for {Solving} of {Fully} {Nonlinear} {Partial} {Differential} {Equations,} by {P.} {Popivanov}},
     journal = {Serdica Mathematical Journal},
     pages = {383--386},
     publisher = {mathdoc},
     volume = {32},
     number = {4},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2006_32_4_a7/}
}