authors)): ?>escapeHtml($this->authors)?>. escapeHtml($this->title)?>periodAfterTitle): ?>. edition)): ?> escapeHtml($this->edition)?> publisher ?? null, $this->year ?? null]); ?> escapeHtml(implode(', ', $publisherAndYear))?>. doiPrefix) && !empty($this->doi)): ?> escapeHtml($this->doiPrefix . $this->doi)?>.