Variogram fitting with a general class of conditionally nonnegative definite functions A Shapiro, JD Botha Computational Statistics & Data Analysis 11 (1), 87-96, 1991 | 173 | 1991 |

A method for multiple superposition of structures A Shapiro, JD Botha, A Pastore, AM Lesk Acta Crystallographica Section A: Foundations of Crystallography 48 (1), 11-14, 1992 | 51 | 1992 |

Sums of two square-zero matrices over an arbitrary field JD Botha Linear Algebra and its Applications 436 (3), 516-524, 2012 | 26 | 2012 |

Uniform indices-of-fit for factor analysis models JD Botha, A Shapiro, JH Steiger Multivariate Behavioral Research 23 (4), 443-450, 1988 | 26 | 1988 |

Dual algorithm for orthogonal procrustes rotations A Shapiro, JD Botha SIAM journal on matrix analysis and applications 9 (3), 378-383, 1988 | 17 | 1988 |

Z-venusol, from Gunnera perpensa, induces apoptotic cell death in breast cancer cells in vitro LJ Mathibe, J Botha, S Naidoo South African journal of botany 102, 228-233, 2016 | 12 | 2016 |

Corticosteroid/cyclophosphamide pulse treatment in South African patients with pemphigus F Shaik, J Botha, J Aboobaker, A Mosam Clinical and experimental dermatology 35 (3), 245-250, 2010 | 12 | 2010 |

Products of diagonalizable matrices JD Botha Linear algebra and its applications 273 (1-3), 65-82, 1998 | 12 | 1998 |

On torsion-free Abelian groups whose endomorphism rings are principal ideal domains JD Botha, PJ Gräbe Communications in Algebra 11 (12), 1343-1354, 1983 | 12 | 1983 |

Assessing medical students' competence in calculating drug doses C Harries, J Botha Pythagoras 34 (2), 1-9, 2013 | 11 | 2013 |

Idempotent factorization of matrices JD Botha Linear and Multilinear Algebra 40 (4), 365-371, 1996 | 10 | 1996 |

Products of two unipotent matrices of index 2 JD Botha Linear algebra and its applications 433 (7), 1447-1451, 2010 | 8 | 2010 |

On a unification result by AR Sourour concerning commutators and products of involutions JD Botha Linear algebra and its applications 416 (2-3), 872-879, 2006 | 7 | 2006 |

Bring Butterflies back to your Garden C Botha, J Botha KwaZulu-Natal Coastal Branch, Botanical Society of South Africa, 2006 | 6 | 2006 |

Square-zero factorization of matrices JD Botha Linear Algebra and its Applications 488, 71-85, 2016 | 5 | 2016 |

Building successful therapeutics into a problem-based medical curriculum in Africa CS Harries, C Mbali, J Botha South African Journal of Higher Education 20 (3), 64-78, 2006 | 5 | 2006 |

Products of diagonalizable matrices over a field of characteristic two JD Botha Linear algebra and its applications 286 (1-3), 37-44, 1999 | 5 | 1999 |

Factorization of a singular matrix into nilpotent matrices with prescribed ranks JD Botha Linear and Multilinear Algebra 38 (1-2), 145-150, 1994 | 5 | 1994 |

Products of idempotent and square-zero matrices JD Botha Linear Algebra and its Applications 497, 116-133, 2016 | 4 | 2016 |

Matrix division with an idempotent divisor or quotient JD Botha Linear Algebra and its Applications 446, 71-90, 2014 | 4 | 2014 |